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Pure Music User`s Guide

1. SHARED GENIUS PLAYLISTS 2 iTunes DJ 2 90 s Music d Classical Music Now Playing Unlimited aaa Active I O Threads 24 0 25 GE Remaining 114 Paul McCartney Wings Download Unlimited Paul McCartney Wings Band on the Rui pi ai ll lat ella 3 Name Band on the Run E Let Me Roll It Mamunia Mrs Vandebilt Picasso s Last Words Drink to Me Band on the Run from One Hand Clapping Helen Wheels Let Me Roll It from One Hand Clapping Nineteen Hundred and Eighty Five Nineteen Hundred and Eighty Five from One Hand Clapping Bluebird Bluebird from One Hand Clapping Country Dreamer Jet from One Hand Clapping Country Dreamer from One Hand Clapping No Words Zoo Gang These Days Hey Rusty Big Snake Sean Penn Blues SNE ees Mr Malcontent Time 5 18 4 13 4 54 4 54 4 46 5 55 5 19 3 52 4 27 5 32 6 05 3 30 3 30 3 10 4 02 2 20 2 38 2 02 2 26 4 31 5 16 3 29 4 49 Sample Rate 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 96 000 kHz 44 100 kHz 44 100 kHz 44 100 kHz 44 100 kHz 44 100 kHz n O 48 Track Disc lof 18 2 of 18 5 of 18 6 of 18 4of 18 8 of 18 6 of 18 lof 18 5 of 18 9 of 18 7 of 18 3 of 18 3 of 18 2 of 18 4of 18 8 of 18 7 of 18 9 of 18 10 of 9 of
2. 7 Allow Manual Play of Unchecked Tracks in iTunes C Compatibility with Tunes 10 Horizontal User Modified Window Button Style UPDATE TRACK PLAY POSITION IN ITUNES Will cause the Tunes play head indicator to be positioned to indicate the play position Note if a dif ferent playlist is selected the position display will blank and won t be active until playback of the next track begins MANUALLY ADJUSTABLE Drag the iTunes play head control for random access within a track The same function is provided in Animate mode by the tonearm controller once the animated image is generated DON T INCREMENT ITUNES SELECTED TRACK IN GAPLESS PLAY When Pure Music changes the selected track in Tunes to reflect the track being played gaplessly it can cause a brief disk access while iTunes fetches track information If the hard drive has spun down gone to sleep this will cause the drive to spin up again To prevent this from happening select this option The track list display and play head position will not be updated in Tunes USE SKIP BUTTON FOR TRACK SEQUENCING Uses a different mechanism for automatic track sequencing by bypassing some track validation steps Pure Music User Guide Release 1 899 18 normally performed by Pure Music when sequencing tracks This option may be incompatible with playlists containing unsupported media types This option also will cause playback to halt after the current track if the Skip Forward
3. e Issue with 1 8 distribution corrected incorrectly reported new version available after installation e Issue corrected involving saving crossover settings between launches e Changed device ID search string from MPS to Playback Designs so other devices with USB DSD 1 bit streaming playback from that manufacturer would be identified and supported 1 8 June 1 2011 e New menu options to disable all DSP options or disable DSP options except upsampling and invert e Direct playback of 1 bit DSD audio files with optional sample rate selection by using Limit DSD to PCM Rate for on the fly conversion to PCM e Native streaming support of 1 bit DSD audio to the Playback Designs MPS3 DSD stream mode e New Software Playthrough feature permits playing other computer audio sources Internet radio movies etc through Pure Music useful for accessing plug ins dithered volume and crossover e New one click feature to assist in configuring crossover filters and appropriate bus arrangement e New metering menu options to set the range of the meter 100 60 30 dB e Add FLAC procedure now works on contents of entire folders or disk volume e File conversion to Apple Lossless now works on contents of entire folders or disk volume e Sample Rate conversion now works on contents of entire folders or disk volume e Removed Info button from sidebar to reduce clutter Info can be toggled from the Metering menu or pressing command I e Now permits u
4. Apple AUParametricEQ wma ww 03 off en Settings akaka Up to 14 plugins may be used simultaneously connected in series or on parallel signal busses for signal conditioning or modification Each pop up menu provides a list of AudioUnit signal processing plugins available on your computer The processing is done in the order of the selected plugins For example the plugin in Menu 2 processes the signal after the selected plugin in Menu 1 is finished More than one instance of the same plugin can be selected The selections are saved and plugins reopened upon the next launch The Bus column determines which output channel bus 1 2 3 4 or All is processed by the plugin The bus number corresponds to the bus number of the stereo channel group in the Multichannel setup tab This can be used for example to only apply a parametric EQ to the subwoofer channel if using the crossover or to apply different signal processing options to different stereo outputs if your audio interface has more than two output channels All buses will be processed by the plug in with All selected in the pop up Bus menu This can save CPU if the same plug in and settings are needed on all signal buses If the CPU load exceeds approximately 50 of the indicator scale there is a high likelihood that skips may occur in the audio playback If this happens either disconnect select Off in the Plug In menu or Bypass plugins until th
5. Sorting Options Lyrics Artwork Volume Adjustment J 100 None 100 Modifies the playback volume on a per track basis according to the per track setting in iTunes Pure Music User Guide Release 1 899 13 Memory Play Optimizations M Gapless Playback M Hybrid Memory Play M Preallocate Takes effect on next launch Hybrid and Preallocate are Required for Gapless DSD and Pure Vinyl Bookmarks GAPLESS PLAYBACK In Memory Play mode tracks will be automatically loaded and played as a group Gapless playback requires both the Preallocate and Hybrid Memory Play options to be enabled these are enabled by default Pure Music analyzes tracks on the fly when they are loaded into memory for gapless playback in contrast with iTunes gapless analysis which is performed in advance Studio albums with normal gaps between tracks are automatically loaded played one at a time To visually indicate gapless tracks iTunes momentarily advances to the next track to show that tracks are linked sequentially HYBRID MEMORY PLAY This feature reads tracks into RAM in the background when MEMORY PLAY mode is enabled Play of the track or first track in a group of gapless tracks commences almost immediately This setting eliminates the inconvenience of a long lag or wait while the tracks are loaded In effect the first few seconds of play are performed while still fetching audio from the storage medium Then after RAM is filled
6. Integer when a PCM format track is played Pure Music User Guide Release 1 899 25 DSD PREFERRED EQUIVALENT PCM SAMPLE RATE MAXIMUM Selects the maximum PCM sample rate for DSD conversion on the fly during playback If the maxi mum sample rate of your DAC is lower the nearest supported power of two sample rate will be used We recommend 88 2 kHz if supported by your DAC there are tradeoffs at higher sample rates Playthrough Playthrough permits playing other computer audio sources Internet radio movie audio etc through Pure Music useful for accessing plug ins dithered volume and crossover as well as not having to quit Pure Music or make adjustments to system audio configuration for playing other audio sources Do not install the Playthrough feature if you don t need to play other audio sources via Pure Music or are not using Hog mode with the Built In audio Beginning with Pure Music 1 88 if an iTunes Internet Radio stream is played and the Automatically Activate Playthrough option is enabled Pure Music will automatically enter Playthrough Mode If a regular audio file track is then played Pure Music will switch back to File Play mode Likewise if an iTunes 128 kbps DRM protected track is played Pure Music will switch to Playthrough mode pre viously such tracks would be skipped because it is illegal to otherwise circumvent DRM protection i i Audio Plug Ins M Select Device From Application Strict D
7. begin playing audio This mode also can be used as a quick way to disconnect Pure Music from iTunes for playing unsup ported media types such as streaming audio or Internet radio or using AirPort AirTunes directly Just place the Less is More Controller in Pause mode After starting play the Selected button can be used to immediately jump to a selected track Pressing Selected with the Option key held down on the keyboard the selected track will be played when the current track or group of gapless tracks is finished playing The Memory Play and Upsampling options can be enabled or disabled in the controller The controller can be dragged with the drag bar near the top of the controller window Click the Close button in the upper left of the controller to exit Less is More Mode Note when playing gapless tracks Memory Play the skip and Selected buttons are disabled Pure Music User Guide Release 1 899 23 Audio Setup Audio Plug Ins M Select Device From Application Strict Device Validation Output Input and Playthrough Special Options Output Device Integer requires Memory Play Preallocate and Supported Device TC Near 192 kHz B Current TC Near Target 192000 Allow Device Hardware Control If Supported _ Volume _ Mute C Enable Exclusive Access Hog Mode Native Integer Format Support DSD Preferred Equivalent PCM Playback Rate Maximum 352 8 kHz B The output device selected in Au
8. channels of the audio output device Trim adjusts the level of that stereo channel pair Make changes to the Trim and Delay settings at a moderate Monitor Gain or audio system listening volume The pop up menus in the Crossover column select the full range audio Off or after performing high HPF or low pass LPF filtering for advanced multi amplified audio system setups see the Crossover Tab section below for more information The Crossover feature is useful if using a stereo or mono subwoofer and separate audio power amplifiers Low and high frequencies may be directed to different stereo channels of your audio interface using Pure Music s 64 bit internal processing The crossover can be configured for two three or four way setups easily accomplished with the Quick Crossover feature also useful for A B comparisones with and with out a subwoofer for example MUTE mutes the corresponding output bus Polarity allows inverting the polarity of one or both channels of the stereo pair Delay permits introducing a linear signal delay to the channels in the primary stereo pair for time aligning loudspeaker drivers For example if a subwoofer is farther from the listening position than the main loudspeakers the main loudspeaker signal may be delayed so that the sound arrives at the listening position from all loudspeakers at the same time time aligned Pure Music User Guide Release 1 899 32 Release Notes Changes No
9. of the desired track Subsequent playback will function as expected This will be addressed in an update the work around is to select and play the desired track after the initial playback commences e DSD Playing 128fs DSD tracks on a DAC that supports 64fs DSD streaming but not 128fs format DSD toggles the Disable DSP setting on alternate tracks e DSD If Upsampling is enabled in Pure Music playing DSD tracks on a DAC that supports DSD streaming will switch off the Upsampling button and not restore the setting when playing PCM work around is to manually toggle Upsampling when returning to PCM playback e DSD Using the playhead in iTunes with 128fs DSD tracks will cause track to end prematurely oth erwise the track will play all the way through 1 89 e Tunes 11 compatibility update incorporates changes contained in the Pure Music d1 through d4 releases d denoting Development release posted on an accelerated schedule e Full compatibility of improvements in version 1 89 with older versions of iTunes e New breakthrough gapless queueing algorithm with much better responsiveness more efficient memory usage and faster loading Analyzes tracks on the fly when they are loaded into memory for gapless playback in contrast with iTunes gapless analysis which is performed in advance stu dio albums with normal gaps between tracks are automatically loaded played individually e Visual cue to indicate gapless tra
10. of the setting of the Update Track Play Position in iTunes and Manually Adjustable options Not yet enabled for groups of Gapless tracks e New option to hide Animate button 1 6 KNOWN ISSUES e On G4 and GS machines sometimes the track position display will stop updating during playback The track position display will resume updating when the next track begins playing Pure Music User Guide Release 1 899 46 1 45 e Eliminated problem preventing sending audio to digital outputs on a Konnekt 24D e Corrected a memory allocation issue that could cause a sudden quit e Eliminated an issue that could cause play to pause unexpectedly e Eliminated a longstanding problem that could sometimes cause an audible hiccup in between switching non gapless tracks in Memory Play mode e Eliminated a problem that could cause an unexpected quit if using Hybrid Memory Play Mode and a new track was selected or double clicked before the previously selected track was finished loading e Eliminated a problem that could cause an unexpected quit if the keyboard skip forward or skip back commands were used before a group of gapless tracks had finished loading e Eliminated an issue that could cause Upsampling to be accidentally activated when a group of gap less tracks in a playlist was followed by a track with a higher sample rate e Improved efficiency of sample rate switching e Improved usability e Reorganized the use
11. sample rate changes using either a dialog box or spoken announcement using the voice selected in the computer s Speech control panel in the computer speakers or the main audio system automatically adjusted for playback volume This also adds a slight extra delay during a sample rate change for DACs that cannot switch sample rates or resynchronize quickly e Compatibility with iTunes 10 0 made a minor change to the window docking position e Additional optimizations to iTunes handshaking and selected track detection 1 6 USABILITY IMPROVEMENTS e Improved efficiency of time alignment correction for crossover e Improved efficiency and reduced latency of crossover when used with NetSend e Improved efficiency of NetSend e Lower signal latency for crossover e Eliminated issue that could prevent crossover from functioning properly if the input and output sample rates were set differently e Eliminated issue that could prevent the sample rate of the audio output device from being set to a previous preference in Advanced Audio Setup e Eliminated stall or annoying repeat that could happen in a random playlist when encountering a single gapless track that s not loaded as part of an album e Require at least two Gapless tagged tracks in a row to load tracks as Gapless e Eliminated a cause of a random audio hiccup that a few users were reporting This was traced to an incongruity between the iTunes play position and the i
12. the end 1 85c e Eliminated playhead positioning issue when playing DSD with PCM conversion 1 85b e Eliminated playhead positioning issue in iTunes with FLAC when downsampling was required Pure Music User Guide Release 1 899 36 e Eliminated issue causing FLAC playback to skip to the next track before reaching track end e Adds FLAC artwork to SRC converted tracks Apple Lossless previously only Bookmark tracks 1 85 e Eliminated unexpected quit when loading extremely large files into memory e New Hide All command hides the Pure Music and iTunes applications e New preference setting that allows changing the button font to Helvetica for computers on which the Arial font is missing or unavailable e Corrected issue introduced in 1 84 where adding FLACs when bookmarks previously existed would unnecessarily copy artwork again e Corrected issue introduced in 1 84 where converting FLACs to Apple Lossless would extract the artwork as separate files e Corrected issue introduced in 1 83 where playing 88 2 kHz tracks on a DAC that only supported 44 1 kHz would play the tracks at incorrect slow speed tracks not downsampled e Corrected issue in Less is More Mode where trying to jump to a track in a different playlist using skip ahead or play selected had no effect 1 84 December 31 2011 e Eliminated issues regarding playhead positioning for downsampled playback Play From Disk e Supports automatically adding embedded ar
13. this option to take effect If you re not using the Remote App or you don t require play position feedback in the Remote app this option should be disabled Pure Music User Guide Release 1 899 5 For best results with this option use the Advanced Audio Setup feature to select your preferred audio playback device and Audio MIDI Setup AMS to set the Default input and output device to Built In or a different device than you re using in Advanced Audio Setup This should be done while iTunes is not running If using the Built In with a toslink digital connection install the Soundflower phantom audio driver see Hog Mode under Advanced Audio Setup and select the 2 channel Soundflower driver in AMS and the Built In Audio in Advanced Audio Setup ALLOW MANUAL PLAYLIST NAVIGATION Keeps the track selection from jumping to the playing track when iTunes is in the front Keep this option checked if you re not using the Remote App to run a headless server and you want to man ually navigate through playlists using the iTunes user interface while also using the Remote App for navigation or control This setting is toggled with the Headless Operaion Only menu command in the Music Server menu or press shift command H iTunes Interaction mM Update Track Play Position in iTunes _ Manually Adjustable 7 Use Skip Button for Track Sequencing Deselect if Playlists Contain Skipped Media Kinds Skip Media Kinds Y Books Podcasts
14. was not tested but is supported now to avoid this issue non FLAC file to the window the folder containing the file would be renamed to Pure Music Bookmark e Corrected issue with file sample rate converter when using the file sample rate converter if the user dragged a 48 kHz file this was not previously supported or tested to the window the loudness of the output file was too low e Corrected issue with file sample rate converter if a 44 1 kHz track was dragged to the window could cause unexpected behavior Now will ignore 44 1 kHz tracks Pure Music User Guide Release 1 899 33 e Corrected issue with file sample rate converter if a track is dragged to the window after playing something in Pure Music the played track is converted instead of the desired track e Corrected issue with file sample rate converter and Add FLAC if both the Add Image and Add Genre special options were activated at the same time and would not create output files or book marks these options should not normally be activated Now the options are exclusive 1 89a e Eliminated a cause of noise transient between DSD format tracks e Eliminated playback interruption if Upsampling is enabled and a DSD track is played 1 89 all versions and revisions KNOWN ISSUES e Apple Remote App Because of a behavioral change in iTunes 11 the first track played using the Remote App after launching Pure Music will be the first track in the library instead
15. with audio play seamlessly continues and no further disk access occurs until the track or group of gapless tracks finishes playing Hybrid track loading in progress Hybrid track loading complete A red colored indicator will appear in the left end of the meter bar during track loading changing to green when the track is fully loaded You must have at least 2 GB physical RAM in your computer to use Hybrid Memory Play effectively Note CPU and disk I O will peak during track loading and will compound the demands on the CPU If you notice stutters or skips in playback with Hybrid Memory Play try turning off some options that consume CPU see Troubleshooting Usually however starting the listening session with a clean slate fresh computer restart will prevent any problems resulting from CPU demands when Hybrid Memory Play is loading tracks Pure Music benefits greatly from having 4 GB or more RAM installed 8 GB or more is preferred PREALLOCATE Reserves memory at launch time providing better performance for audio playback This option will be disabled if less than about 2 GB of contiguous free memory is available when Pure Music is launched and under this circumstance the memory play dial will be displayed in the sidebar The amount of contiguous unfragmented memory available for use by Pure Music can be signifi cantly less than the amount of installed memory Preallocate is required for playback of Gapless tracks D
16. 1 Don t play music during the Add operation which requires the full attention of the computer The opera tion is designed to saturate all available processor cores for fastest throughput 2 Memory Play mode and Preallocate must be enabled to play the tracks 3 Pure Music creates a special file in the same directory as the FLAC DSD files called Pure Music Bookmark This helps Pure Music in locating and playing the tracks Do not move or delete this file or move the tracks after performing the Add operation Tunes will lose the link to the tracks if they are moved same as moving any music tracks in the Tunes library To add artwork to FLAC tracks added with Pure Music 1 83 or earlier depress the Caps Lock key on the keyboard and the Add FLAC operation will add art without re creating the bookmark tracks the next time a track is played the artwork will appear in iTunes 4 The FLAC DSD tracks in iTunes only are playable in conjunction with Pure Music If they are played in iTunes they will be silent 5 DSD bookmark creation takes significantly longer than FLAC because of the higher sample rate 64 times more silent packets must be written for 64Fs DSD but indicates the correct sample rate in iTunes useful for sorting Pure Music User Guide C Release 1 899 21 File Format Converter Select Convert Audio Files to Apple Lossless from the Pure Music menu and drag tracks folders to the window Apple Los
17. 10 8 of 10 7 of 10 6 of 10 rNNNN ENE NNN BP nn no N lofl lofl lofl lofl lofi Cancel Artist Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Paul McCartney Wings Lloyd Cole amp The Co Lloyd Cole amp The Co Lloyd Cole amp The Co Lloyd Cole The Co Llovd Cole The Co Ll Album Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Band on Mainstri Mainstre Mainstri Mainstri Ma nstri After a few moments the music tracks will be listed in the Tunes player window where they can be selected and played like any other music tracks while Pure Music is running The tracks shown in Tunes will have a 16 bit word length and a very low bit rate This is normal because the tracks are only bookmarks used by Pure Music and refer to a highly compressed 300 times smaller than the original guide file that contains silence Pure Music only plays the original FLAC DSD files Adding FLAC DSD tracks Tips and other information
18. 81D5R1 INTERIM RELEASE FOR OS 10 7 e One small change for OS X 10 7 accommodates different API behavior regarding enabling Hog mode e Now recognizes and applies iTunes Track Volume Adjustment option with DSP enabled e Better checking for free disk space for adding bookmark files for DSD and FLAC e Stream change notifications now also controlled by sample rate change notifications announce op tion e Properly handles Disable DSP when enabling or disabling Integer mode when in Pause mode e Eliminated problem that could cause a noise to be emitted at the beginning of a dsf format audio track e Eliminated problem that could cause a noise to be emitted when changing between 128Fs DSD tracks Pure Music User Guide Release 1 899 38 e Now allocates only one thread per CPU instead of two for rendering operations e Plays monophonic FLAC files in both channels e Disabled manual adjustability of playhead with Gapless to avoid inadvertent skipping or looping e Corrected cosmetic issues regarding vinyl 45 animation e Corrected cosmetic issue where upsampling from 88 2 to 96 kHz wasn t indicated in meter bar e Corrected problem preventing selection of output bit depth in sample rate converter e Corrected problem that could cause FLAC or DSD Add operation to terminate prematurely with out adding all of the dragged tracks e Corrected problem with the Channel D PAD Uninstall command that could cause uninstall to fail 1 8a
19. 88 2 kHz 96 kHz 96 kHz 96 kHz 176 4 kHz 96 kHz downsampled 176 4 kHz 192 kHz 96 kHz downsampled 192 kHz Upsampling On Target launch Rate 88 2 kHz Pure Music User Guide Release 1 899 10 pr ooo 44 1 kHz 88 2 kHz 88 2 kHz 48 kHz 88 2 kHz 88 2 kHz 88 2 kHz 88 2 kHz 88 2 kHz 96 kHz 96 kHz 96 kHz 176 4 kHz 96 kHz downsampled 176 4 kHz 192 kHz 96 kHz downsampled 192 kHz Upsampling On Target launch Rate 96 kHz pi g 44 1 kHz 96 kHz 96 kHz 48 kHz 96 kHz 96 kHz 88 2 kHz 96 kHz 96 kHz 96 kHz 96 kHz 96 kHz 176 4 kHz 96 kHz downsampled 176 4 kHz 192 kHz 96 kHz downsampled 192 kHz VINYL 45 With Memory Play enabled the currently playing track will be reloaded and the application window will switch into the fun Vinyl Animation mode The animation tonearm controller can be used once the vinyl image generation is complete to adjust the playhead position The Animate button isn t visible unless enabled in the Music Server Preferences Special tab Also Animate is currently unavailable with the Preallocate feature enabled This limitation will be eliminated in a future update RESET PREFS Terminates the current connection and re initializes the Tunes handshaking session PREFS Pressing this button will restore responsiveness should the handshaking connection become disrupted Also available as a menu
20. 9 43 e New option to hide the Pure Music UI leaves a vestigial badge that follows the iTunes window e New option to allow manually playing an unchecked track in iTunes by selecting the track and pressing the play button or Return on the keyboard e New option to position window correctly for user hacked preferences in iTunes 10 causing iTunes to display old style horizontal window buttons 1 63 e Ignores Track Number tag attribute for Gapless tracks if not present e Eliminates sudden quit if rapidly changing tracks in Less is More mode when using Hybrid Mem ory Play e Eliminates sudden quit issue introduced in 1 61 when starting to play a track with certain audio in terfaces e Eliminated an issue that could cause Pure Music s UI and actual play states to become unsynchro nized e Eliminated an issue that could cause Pure Music to be unresponsive to the Skip controls in iTunes after exiting Less is More mode e Metering and Info button settings now preserved if Quitting Pure Music while in Less is More mode e Disable Main System as a choice for Announce Sample Rate on OS 10 5 only available on 10 6 or later e Added processing load indication in Preferences window and now reflects critical time CPU block ing not just plugin load so won t be disabled by disabling plugins e If CPU critical time blocking is over 70 will automatically reduce dither noise shaping order if dither is being used e CPU load i
21. CHANNEL D Pure Music User s Guide Release 1 89g R3 May 17 2013 CHANNEL D Table of Contents System Requirements Installing 0 eee rro 3 Configuring the DAC Audio Output Device 0 eee nerean 4 Optimizing System Performance for Audio 0 0 c cece cee eee n eee eens 5 Using Pure MUSIC ninio cde teres ale ea A A A Oe anata aE Oe alate 6 About Pure Music Feature Descriptions 0c eee ee cece nee ranere 6 iTunes Music Server Options Preference Settings Metering menu 0000 eee eee eeee 7 Music Server MENU aa 8 Basic Music Server Preferentes rail nla v deve ANE a ba bee 12 Advanced Music Server Preferences 000s cece cece cece teen teen nee n eens 12 Special Application Preferentes smart nig A Roe Got ah Weel EE OR RCS eK aes 15 Special iTunes Preferentes ar ida Hes Adee a kya 18 FLAG DSD File Playback uba ai A AA baa eae A RS 20 File Format Converter File Sample Rate Converter 00 e eee urune eee eee eens 22 Less is More Controller Mode 11 cee cece eect nen e nent e ene enes 23 Audio Setup ii A Se led dyed AA A Rade ae ate 24 Playthrough iii AA A A ghee ad aes aa 26 Special Audio Setup Options sias 20 0 ccc eee een n ene n teen e ene E eens 29 Audio Unit Plug Ins acces cence e td da a edie Gna a AUS Ai adele aes 30 Multichannel Output ssr cee ee a oe ee Ed ee eee ees 32 Release Notes Changes veia A dia a a wee ened 33 49 Pure Musi
22. Fer Built in Parametric EQ Plug ins Plug in 01 fabfilter Save Settings Third party FabFilter Pro Q 24 band parametric equalizer plugin plug in is not included with Pure Music shown for illustration Pure Music User Guide Release 1 899 31 Multichannel Output Signal Modifiers NetSend Multichannel setup Crossover Bus Output Crossover MUTE Polarity 1 1L 2R 5 or O Normal 3 aia Trim a pa AE AA ze Tenet a an oo i Delay ms 0 00 II A _ AAA K A _ Fine 2 of E of O Normal i Trim dB o oe 0 0 O J Delay ms 0 00 Q Fine 3 off is or O Normal 3 Trim dB NS 0 0 O D Delay ms 0 00 O Fine 4 of 3 or E O Norma W Trim 48 y 0 0 O e Delay ms O 00 Qe FING r g ET Er 4 funn Quick Crossover None H L L H L M H L M H T This advanced feature tab may be used to mirror the audio output to multiple channels of your audio interface for distributed hard wired audio set the Crossover column to Off for those channels The normal setting is shown Except for the Polarity column your audio interface must have more than two output channels to be able to use these features Please download the Pure Music Crossover document from our website Downloads page www channel d com for complete instructions on using Pure Music s 64 bit crossover feature The pop up menus in the Output column enable the associated
23. LLER selects the secondary two channel audio stream for this device This allows using the digital outputs instead of the analog outputs The AES EBU output will appear on Multi channel selector channels 1L and 2R and the S PDIF output on channels 3L and 4R DSD STREAMING DEVICE this check box and text entry box whitelists a DAC as supporting di rect DSD streaming Do not activate this option unless you are certain that your DAC supports DSD streaming When a DSD file is played it will be sent using the DoP DSD over PCM DSD pro tocol instead of being converted and transmitted as PCM DSD support was first introduced in Pure Music 1 8 in May 2011 and beginning with Pure Music 1 88 the default Flag scheme was changed to OSFA which corresponds to the current DoP ad hoc standard now adopted by all DSD DAC manu facturers Click Copy Current Output Device Name and check the DSD Streaming Device check box To com plete the configuration important click the Click to Apply Changes button For more information please refer to the Pure Music Pure Vinyl DSD Streaming DAC Setup Guide which can be downloaded from our website Pure Music User Guide Release 1 899 29 AudioUnit Plug Ins Audio Setup Device Selection Audio Plug Ins Automatically Open Settings CPU Load 1 Bypass All Plug ins O Keep Settings Windows On Top Plug in Bus Bypass Dither 01 Apple AUParametricEQ SES DO Settings 02
24. SD files are converted to PCM on the fly during playback to the selected DSD sample rate in Pure Music s Audio Setup window If the DAC supports native DSD playback they will be sent as native DSD see Special Options under Audio Setup elsewhere in this User s Guide IMPORTANT Before using _Advanced this feature to add FLAC or R gt DSD files the Keep iTunes U Y a B ty E za E General Playback Sharing Store Parental Apple TV Devices Advanced Media Folder Organized and Copy files to iTunes Media manes Media folder locali Folder when adding to library Volumes Music rTunes Change options in Tunes must be dis oo abled They are Located in the Advanced tab of the O Keep iTunes Media folder organized P Places files into album and artist folders and names the fles based on Preferences of iTunes If you the disc mumber track number and the song title inadvertently add some FLAC C Copy files to Tunes Media folder when adding to library or DSD files with these options enabled please see the Support section of our website for help on how to proceed Note making these preference settings will not adversely affect the operation of iTunes or affect copying CDs to your music library with iTunes CD ripping does not involve the Copy files set ting Copy files only has an effect when manually copying files and causes iTunes to create duplicates of any tracks you add to iT
25. SD tracks or Bookmark tracks from recordings created with Channel D Pure Vinyl Pure Music User Guide Release 1 899 14 Special Application Preferences Basic Advanced Special The original default settings are best for new users Please read option descriptions in the User Guide before changing settings M Notify When Busy Loading Into Memory _ When Info Button Disabled Don t Show Scrolling Text When Idle _ Allow Automatic Idle System Sleep _ Set Upsampling Target Rate Ceiling at Launch Important Read Description in User Guide Before Activating Enable Vinyl 45 Animation NOTIFY WHEN BUSY LOADING INTO MEMORY Draws an overlay on the iTunes window indicating Pure Music is loading tracks into memory This also serves the function of momentarily disabling user inour to iTunes because the Play track selec tion and other operations will be unresponsive at this time WHEN INFO BUTTON DISABLED DON T SHOW SCROLLING TEXT WHEN IDLE Prevents Pure Music from displaying the scrolling text display when idle to avoid generating updates which consume bandwidth in screen sharing situations This option completely disables the scrolling text display This is useful for headless servers run via VNC to a wireless device where the scrolling display causes sluggish performance due to frequent screen updates ALLOW AUTOMATIC IDLE SYSTEM SLEEP Normally Pure Music intercepts and overrides requests b
26. User Guide Release 1 899 47 1 41 e Changes to dither algorithm e Eliminates the song repeat at the end of a playlist with Faster Track Switching deselected or in Less is More mode e Improvements to handshaking with iTunes e Added option in Advanced Audio Setup to allow selecting digital output streams with a MOTU Traveler interface This will map the outputs to channels 9 14 of the Traveler e Added control bar Invert option to invert the signal polarity of both channels This is done in a bit per fect way Note there may be a brief disturbance to the audio when the option is activated deactivated 1 4 e Support for audio interface DAC hardware volume control in stereo audio devices such as the Wavelength Proton DAC Currently only devices with stereo output will be recognized Support for multichannel gt 2 outputs hardware will be added soon The Monitor volume and Mute controls will be mapped to the volume control in the device hardware and the internal gain of Pure Music set to 0 dB providing bit perfect audio if no other signal processing options are selected e Improvement to the sound quality of the volume control dithering e New All option for Plug Ins for processing all buses simultaneously providing lower CPU over head if using the Crossover feature or multiple output channels e Fixes upsampler and crossover issues introduced in 1 3 e Fixed problem causing Plug In CPU load indicator to report
27. WER OF TWO UPSAMPLING If the appropriate sample rate is supported by the DAC Pure Music will endeavor to only upsample by multiples of 2 This operation is more efficient than factored upsampling and in the case of Red book CD 88 2 kHz is all things considered a better target than 96 kHz However this can be overridden for the special case of a target rate of 192 kHz or greater check the Always Upsample Redbook to 192 kHz option OPERATION TAGS INVERT AUDIO POLARITY WHEN INVERTPOLARITY TAG IS DETECTED Composer Johnny Thunders Comments invertpolarity Genre Rock fs _ Part of a compilation If the text invertpolarity is present in the Comments tag field in iTunes see illustration below this will cause the track to be played back in Pure Music with inverted signal polarity and indicated by displaying INVERT in the meter bar This can be used to correct the absolute playback polarity if the track is known to have been recorded with inverted polarity The polarity inversion will be in addi tion to any other application settings such as the global Invert button OTHER OPERATION TAGS e monophonic Mix the track to mono during playback e gaplessbreak Terminate gapless load af an album at the previous track Resume beginning with track with gaplessbreak tag for subsequent group of gapless tracks loaded OBSERVE ITUNES PER TRACK VOLUME SETTING I m Confessin That Love You l Summary Info Video
28. ack Rate Maximum 352 8 kHz Pure Music User Guide Release 1 899 Optimizing System Performance for Audio e Don t share audio device and storage buses With a FireWire audio device use USB2 SATA or a NAS for audio storage With a USB audio device use FireWire SATA or a NAS for audio storage One device per bus Don t use a hub port expander with an audio device Do not daisy chain audio devices with other audio devices or hard drives FireWire e Set Computer Sleep to Never Apple Energy Saver Preferences e Set Computer Screen Saver Activation to Never Apple Desktop and Screen Saver Preferences e Disable Automatic Checking for updates Apple Software Update Preferences These options can cause stutters or skips in playback e Disable Hard Disk Sleep in the Energy Saver System Preferences e Laptop computers should be run with the power adapter connected to avoid CPU throttling and other energy saving measures undertaken by the OS which can affect audio performance e Minimize use of other applications especially when playing high resolution audio Don t surf the web which may cause skips in audio playback e Store audio on an external disk not the system disk e Disable Spotlight indexing on disk used to store audio Spotlight Preferences drag the hard disk icon to the window in the Privacy tab e Wait until Spotlight indexing is complete on disks using it Don t run other audio appl
29. button is disabled in iTunes such as when a different playlist is selected while a track is playing If your playlists contain media other than audio tracks or DRM protected audio this option should not be used SKIP MEDIA KINDS By default media in Audiobook and Podcast playlists are skipped If you want to play media from those playlists deselect Audiobooks or Podcasts Pure Music cannot play Movies TV Shows or Videos nor can streamed audio tracks be played Internet radio or iTunes Shared files A fall back way to play streamed or other such media is to quit Pure Music and use iTunes and if you wish to later play file based audio relaunch Pure Music Unfortunately iTunes controls the connection protocol and therefore has control of the audio source We have received reports of Pure Music users using the third party application Airfoil successfully in conjunction with Pure Music for playing streamed audio however and for best results make sure any volume adjustments are disabled in Airfoil See the Pure Music Tips and FAQ section of our website for more information on playing Shared music tracks Pure Music supports all audio formats that are supported by iTunes because Pure Music fetches the track from the iTunes playlist iTunes currently doesn t support FLAC format The solution is to con vert FLAC to either uncompressed PCM or Apple Lossless both of which support 192 kHz 24 bit or higher using an audio utility applicatio
30. c User Guide Release 1 899 2 System Requirements Installing SYSTEM REQUIREMENTS Mac OS X 10 5 8 or later G4 GS or Intel processor Multi core processor preferred Pure Music is multithreaded for optimum performance 1 GB or more RAM Memory Play Gapless playback will require at least 2 GB installed RAM CD quality tracks 8 GB is preferred for higher sample rates Demo 15 day feature unrestricted trial period After 15 days the software will fade audio or add a very low level audio tone to playback or both about 10 minutes after launch Installing a new ver sion after the 15 day limit will restore a 7 day unrestricted feature grace period An activation code for Channel D s Pure Vinyl application software also is compatible with Pure Music INSTALLING UPDATING Drag the Pure Music application icon and the Pure Music User Guide to the Applications folder icon Pure Music window e0n0 Pure Music Pure Music User s Pure Music app Applications Guide pdf Drag amp drop the Pure Music app icon on the Applications folder e If updating an older version of Pure Music confirm replacing the previous version e If you have purchased an activation code it will automatically be recognized in a new version Finally eject the disk image click in the Pure Music window and press command E on the keyboard or else use the Eject command in the Finder s File menu to eject it The default f
31. c and Tunes for situations where you don t need to monitor the user interfaces of Pure Music or iTunes To show Pure Music or iTunes select their icons in the Dock UPSAMPLING MEMORY PLAY INVERT toggles the same functions as the buttons with the same names described below HEADLESS OPERATION ONLY toggles the setting of the Allow Manual Playlist Navigation options used with Update Play Position in Remote App without having to open the Preferences window PLAYTHROUGH see Playthrough section of the User s Guide DISABLE DSP OPTIONS Bypasses the volume control dithering plug ins Upsampling and other options that might alter the audio This setting automatically provides a bit perfect signal conduit A side chain is used to determine the signal levels for metering except in Integer mode The left side control bar in Pure Music is hidden when this option is activated because the volume control is disabled An alternative menu choice disables signal processing except Upsampling Mono and Invert Disable DSP is automatically invoked in Native Device Integer Mode el MONITOR f The Monitor slider adjusts the playback level Mute mutes the output without affecting the Monitor setting Dim reduces the Monitor setting by 12 dB and also changes the maximum setting to O dB and increase or reduce the Monitor setting by 1 dB increments or can be controlled from the keyboard when the main window is frontmost by pressing the up or down a
32. ch have been replaced with check boxes for FLAC DSD bookmark generation to a separate modal dialog e Notifies user with a dialog box message if the original FLAC or DSD media is not available when playing a Bookmark instead of simply pausing playback e New option to re add a missing Genre tag using alternate gen tag without re creating an existing Bookmark e New option to keep plug in windows floating above all other application windows e Fixed problem preventing the MUTE check box for Bus 1 in the Multichannel tab from working e For FLAC tracks shows progress in percent of loading track into memory this is not possible with other file types because of the performance optimizations taken e DSD streaming DoP flag now defaults to newer standard OSFA instead of AAAA e Resynchronizes NetSend communication each time a new track starts playing e New NetSend menu for activating disconnecting NetSend e Support for Nonmixable Integer Stream mode with Lynx Hilo including multiple output buses 1 86 e Eliminated issue resulting in incorrect track length for long more than ca 23 minuttes DSD tracks e Eliminated issue when loading a gapless FLAC album followed in the playlist by a track with an other file format e Eliminated issue causing unexpected quit on launch in OS X 10 7 3 e Eliminated issue causing non FLAC tracks downsampled in real time for example a 192 kHz track played using a 96 kHz DAC to stop playing before reaching
33. cks iTunes briefly advances to next track to show that they are linked for playback replaces loading gapless tracks notification e Playhead scrubbing positioning supported with gapless tracks e Eliminated issue in iTunes 11 in which an attempt at playing the first track fails after launching Pure Music e Fixed issue with Gapless playback in iTunes 11 when graphic music library views are used e Incorporates trusted developer signing certificate e Improvements to Auto Playthrough on non English language localized computers Pure Music User Guide Release 1 899 34 e Improvements to reliability of automatic toggling between Playthrough and file playback e New Constrain Sample Rate check box on by default for Playthrough improves performance e Eliminated an unnecessary audio device stop operation when not changing the sample rate e Corrected situation where clicking a button caused an unexpected quit e NetSend auto resynchronization improved e Added check box for NetSend auto resynchronize feature will be off by default e Found cause of and eliminated noise that sometimes occurred when changing between FLAC tracks with different sample rates e Eliminated cause of unresponsiveness when beginning playback after launch e Corrected issue involving gapless FLAC tracks prematurely moving to next track 1 88a Release version of Pure Music 1 88 no changes from version incorporated into Pure Vinyl 1 88 incorpora
34. cluding a screen shot of the display and information regard ing the specific music album if any non English character rendering issues remain on your system e Now supports audio devices with sample rates of 352 8 and 384 kHz if when they become available e New option for Upsampling only upsample to a power of two using available DAC sample rates For example 44 1 kHz will be preferentially upsampled to 88 2 rather than 96 kHz e New option for Pure Music to automatically invert signal polarity if the track Comment tag in Tunes includes the string invertpolarity e Up to 4 way loudspeaker crossover e NetSend now supports streaming audio at sample rates of up to 192 kHz 24 bit uncompressed Note data rate over network at 192 kHz is 1 MB s per stream and requires a wired Ethernet connection e Four independent nameable NetSend streams for connecting up to four different networked com puters and multichannel audio interfaces at up to 192 kHz e Added 3 additional AudioUnit plug in slots e All four output buses can be corrected for crossover time alignment e Multichannel Output Bus 1 now can be connected to any group of output channels e Optional selectable dithering at the output of any or all of the four output buses e New option to enable automatic idle system sleep e Plug in window positions are saved e If the playhead is changed in iTunes while the track is paused play resumes at new location inde pendent
35. dio MIDI Setup cannot be used with Hog mode Current Device and Target sample rate are only updated at launch time Click to Apply Changes Application Will Relaunch Special SS Close SELECT DEVICE FROM APPLICATION With this option there is no need to use Apple s Audio MIDI Setup application to configure the audio device The audio device used by Pure Music can be different than the device selected in Audio MIDI Setup and or automatically use a different target sample rate Select the desired Output Device and sample rate For best results the Input Device should be config ured in a similar way to the Output Device Then click Apply Changes Pure Music will immediately relaunch and use the new audio device and settings Changes made to the pop up menus only will take effect if the Apply Changes button is clicked Also the Current and Target parameters reflect the audio hardware state when Pure Music is launched and aren t updated afterwards If you want to determine the current sample rate this information is dis played in the meter bar or else open the Audio MIDI Setup application ALLOW HARDWARE DEVICE CONTROL Some audio interfaces DACs use specialized internal circuitry for gain control This can provide improved sound quality if implemented in the analog domain because there is no word length trunca tion at gain settings below 0 dB compared to using a digital gain control Pure Music supports most stere
36. double the actual load value Updated the Memory Play memory measuring mechanism to better report and use the total amount of memory when greater than 4 GB e Upsampling now is selectable for a Target Sample Rate of 48 kHz or greater Dims the Reverse option when it s not available this option requires Memory Play not Hybrid Mode and non gapless tracks e Better handling of the situation where an updated version of iTunes displays its EULA the first time the Tunes update is launched 1 3 Fixes some minor Ul issues such as having Upsampling selectable when the Target Rate was only 44 1 or 48 kHz when the audio track sample rate and the audio output sample rate were the same the Upsampling processing was completely bypassed New features Less is More Controller Mode Reverse playback Fast Track Switching option Se lected Track Next Song queue setting 1 2 New AudioUnit plug in support Pure Music User Guide Release 1 8991 48 Copyright 2009 2010 2011 2012 2013 Channel D All Rights Reserved Pure Music is a Registered Trademark of Channel D United States and international patents pending Channel D Pure Music http www channel d com Pure Music User Guide Release 1 8991 49
37. e load drops below about 50 The CPU load will depend on the sample rate with significantly higher load at higher sample rates Apple s Activity Monitor applica tion Applications Utilities provides an alternate way to monitor CPU load The Dither check box is used to provide dithering after the output of the last plug in on the bus as the last step in the signal chain before conversion to the native integer word length of the audio output device before sending the audio to the device This will default to 0 7 LSB of dither if Pure Music s volume control dithering is disabled Otherwise Pure Music s dithering setting determines the amount of dithering to be applied at the last step and the plug in Dither check boxes will have no effect Note Audio plug ins should be copied to Library Audio Plug Ins Components to easily open this folder select Go to Folder from the Go menu in the Finder then type Library Audio Plug Ins Com ponents in the box and click Go Newly added plug ins will appear in the plug ins list the next time Pure Music is launched SETTINGS When a plugin is opened a Settings window opens to allow changing the plugin parameters The title of the window indicates the pop up plugin menu it s associated with To bring the plugin settings win dow to the front if more than one is open click the Settings button This also can be used to reopen a closed plugin settings window Plug in Settings windows are reope
38. e when switching between DSD or FLAC tracks providing improved performance with those formats e Single key keyboard commands are now off by default e Pads the beginning of DSD streamed tracks with DSD silence to give DoP compliant DSD DACs additional time to lock on to the signal before playing music e Pre rolls plug ins to give them time to settle This avoids a spike in CPU in the IO proc which could happen with convolution or room correction plug ins when calculating filter coefficients Pure Music User Guide Release 1 899 35 e Only opens plug in windows once on application launch if Automatically Open Settings is en abled avoiding annoying re opening setting windows each time a plug in was reconfigured e Improved reliability and execution speed of Add FLAC DSD operation e When album tag is missing in FLAC or DSD file will substitute name of enclosing folder previ ously used to substitute Pure Music Bookmark e FLAC and DSD Bookmarks generated more accurately match originals in duration worked around a quirk of Apple s APIs that could cause Pure Music s Bookmark tracks to be 1 to 2 seconds longer e Eliminated problem that prevented performing the Add FLAC DSD operation on more than one track at a time on computers with one CPU core G4 processor e Now uses alternate form of genre Ogen tag for adding genre tag in FLAC bookmark files e Moved Options including arcane key modifiers whi
39. eding special settings in iTunes to access FLAC files from iTunes playlist Pure Music User Guide Release 1 899 40 1 73 e Corrected an issue that could cause the dialog for Less is More to be positioned partly offscreen hiding the dismiss OK button e Improved operation of Add FLAC on older Mac machines lt 2 GHz e Changed name of Advanced Audio Setup to Audio Setup as this is the preferred way to select the audio hardware used with Pure Music Removed Strict Device Validation in the Audio Setup e New Headless Operation menu item provides a way to toggle Allow Manual Playlist Navigation without opening the Preferences e Corrected an issue that could cause Add FLAC to not accept tracks from directories containing characters other than alphanumeric Roman alphabet e Automatically minimize iTunes window when opening Add FLAC convert files panel to make dragging to the panel easier e Gapless playback now requires Preallocate to be enabled and active Users with insufficient RAM for Preallocate that want to use gapless playback should use Pure Music 1 65a 1 72a e Corrected an issue that could with certain DACs audio devices cause an unexpected quit to occur when Pure Music incremented the playing track 1 72 e Corrected issue which kept Pure Music from automatically switching the sample rate if the Ad vanced Audio Setup feature wasn t being used This also had a side effect of preventing FLAC playback from wor
40. elect your preferred audio hardware from the Output Device pop up menu If you are using the built in optical digital output set the menu to Built in Output Here the device is the Proton USBDAC as shown below Output Device Integer requires Memory Play Preallocate and Supported Device Proton USBDAC E 96 khz Current Built in Output Target 44100 Allow Device Hardware Control If Supported _ Volume _ Mute Enable Exclusive Access Hog Mode Native Integer Format Support DSD Preferred Equivalent PCM Playback Rate Maximum 352 8 kHz 5 2 Set the sample rate menu to the right to the maximum value as shown here 96 kHz for the Pro ton other audio hardware may provide maximum sample rates from 44 1 kHz to 384 kHz 3 IMPORTANT click the Click to Apply Changes button Click to Apply Changes Application Will Relaunch 4 Pure Music will re launch itself Note the Pure Music icon may be duplicated in the dock This is cosmetic only and will disappear the next time Pure Music is launched The selected audio hardware device will appear to the right of the Current label Output Device Integer requires Memory Play Preallocate and Supported Device Proton USBDAC 96 kHz Current Proton USBDAC Target 96000 Allow Device Hardware Control If Supported C Volume _ Mute C Enable Exclusive Access Hog Mode Native integer Format Support DSD Preferred Equivalent PCM Playb
41. evice Validation Output Input and Playthrough Special Options Channel D Playthrough Audio Driver Read User Guide Before Installing o Automatically Set Preferred Default Device Remove M Constrain Sample Rate Automatically Activate Installed Version 1 0 Click Install to install the Channel D Playthrough Audio Driver PAD Install Channel D Playthrough Audio Driver PAD A Click Install to install the Channel D Playthrough Driver After the installer launches if you decide to cancel the installation simply quit the installer Cancel C Install Channel D Playthrough Driver Pure Music will automatically Quit Pure Music will quit You will be required to validate as an administrative user to install the driver If you would like to cancel the installation at this stage without installing the PAD simply Quit the In staller application Pure Music User Guide Release 1 899 26 Install Channel_dPAD Welcome to the Channel_dPAD Installer Introduction Destination Sele You will be guided through the steps necessary to install this software AOA Install Channel_dPAD The installation was completed successfully Introduction Destination Installatior 6 Installation The installation was successful The software was installed If you want to uninstall the Channel D Playthrough Audio Driver click the Remove button in
42. for an example of this using the Channel D PAD If using the Built In audio with a toslink cable install the Channel D Playthrough Audio Driver see below and select it in AMS as a default device Alternatively purchase an inexpensive pair of USB Computer Speakers and select them in AMS to use for playing system sounds Disabling Strict Device Validation in Pure Music will bypass this requirement but doing so is at your own risk as it may cause unexpected behavior in iTunes or Pure Music or other issues NATIVE INTEGER DEVICE SUPPORT NONMIXABLE INTEGER DEVICE STREAM After setting Hog mode and pressing Click to Apply Changes this option will be available if the audio device supports nonmixable native integer streams This will bypass all signal processing in Pure Music including the volume control Selecting Integer will cause the warning to appear A Warning Output volume will be set to maximum 0 dB The Crossover and other DSP options plug ins will also be bypassed Cancel a 3 Integer mode requires Memory Play plus the Preallocate feature Disable DSP Options mode automatically will be activated see Disable DSP Options below and the menus that configure signal processing options and metering will be hidden Signal level metering will be disabled If a DSD track is played with Integer in effect the device format will be switched back to a floating point format for PCM conversion but will revert to
43. ges without interrupting playback of the current song this feature now has been deplicated by iTunes 11 s new Up Next feature This feature cannot be used when the Update Play Position in Remote option is enabled MEMORY PLAY A If sufficient free memory RAM is available each track or group of gapless tracks PLAY will be loaded into and played from RAM The user interface will be briefly unrespon a sive during the track loading process when loading gapless tracks With compressed either lossless or lossy tracks the audio is first uncompressed before loading it into RAM Upsampie Please see the Pure Music Tips and FAQ section of our website for more information on using Memory Play The Memory Play Adjustment Dial used in earlier versions of Pure Music is hidden with the Preallocate option because memory usage is automatically optimized with Preallocate Pure Music User Guide Release 1 899 9 REVERSE Set your ears on fire searching for hidden messages with this fun m feature The button only is enabled with Memory Play activated non gapless tracks and the Hybrid Memory Play setting turned off After activating this feature it will take effect some might say take hold on the next track played UPSAMPLE The sample rate of your audio interface should be set to the desired sample rate for Upsampling before launching Pure Music If your audio interface is set to 44 1 kHz at launch the Upsa
44. ic plus iTunes idly acting only as the user interface and data base server is significantly less than the CPU footprint of iTunes used alone for playback because iTunes is not actively playing the music or otherwise touching or pretending to play the music track which needlessly wastes CPU and the Pure Music music playback engine is highly optimized for both performance and audio quality iTunes Music Server Options Preference Settings Important Note Some of the available options only are accessible after clicking the Advanced button in the control window METERING Enables disables the Firefly stereo level meter bar Metering Options The Metering button menu choice activates or deactivates the signal metering display RESET Peak Reset resets the peak hold indicators and meter display DYNAMICS Show Dynamic Range can be used to estimate the dynamic range of the program material cf Loudness Wars The reading is reset each time a new track begins to play and indicates the difference in dB between the peak level and the long term RMS Leq level Track Info toggles the scrolling Metering track information display INPUT Source shows the m y ES v Signal Metering 38M raw audio level from the music file The OUTPUT Peak Rezet DHZ button meters the signal level after the Monitor volume Show Dynamic Range D setting Master Output shows the effect of the Monitor Track Info 31 volume setting plus an
45. ications at the same time as Pure Music except iTunes Avoid using video playback applications including playing video in a web browser After installing OS or iTunes Updates e Important If iTunes is busy determining gapless information or getting Genius information etc wait until iTunes in finished or else press the Cancel X button in the iTunes dashboard before playing any music iTunes indexing or other activity can consume a tremendous amount of CPU and Pure Music may not respond normally at such times This will occur when first setting up a library in iTunes after setting up a new computer or updating the OS after updating to a new version of iTunes or moving your library from one computer to another The solution is to allow the computer to sit undisturbed for a few hours until these housekeeping chores are finished Use Apple s Activity Monitor application to monitor CPU activity for guidance in indicating when the system has returned to normal idle activity levels sorting by CPU with Activity Monitor set to show All Processes Pure Music User Guide Release 1 899 5 Using Pure Music Important Note Some of the available options only are accessible after clicking the Advanced button in the control window To use Pure Music just launch the Pure Music application After iTunes launches optionally select a music track Then press Return on the keyboard Play in iTunes or the keyboard s
46. ion in Audio Setup preferences e Hide Info in Playthrough Mode e Check to see if the default device is the Channel D PAD if not don t enable playthrough e No longer ignores spacebar key presses for Advanced Audio window e Pure Music now downsamples FLAC if the audio device doesn t natively support the file sample rate e Eliminated possible freezing issue caused when playing a bookmark track and the original FLAC or DSD track couldn t be located because the file was moved after performing Add operation e Can re generate bookmarks by holding down the option key on the keyboard while dropping items in the Add window e Eliminated issue preventing Mute for individual output buses from working on buses 2 3 and 4 e Eliminated noises between tracks when playing FLAC if the sample rate was changed e Recognizes nonstandard uppercase FLAC file extension as being equivalent to flac 1 82 e Eliminated issue causing playback stall in OS 10 7 when automatically changing sample rates e Eliminated issue in OS 10 7 preventing adding tracks to Tunes e Improved Add FLAC DSD operation e Add window now floats on top of all other windows e Add operation no longer causes last track added to automatically begin playing e Eliminated issue causing noises in between playing DSD tracks e Channel D PAD eliminated from Output Device menu e Can re add FLAC DSD bookmarks without recreating them using previous bookmarks 1
47. irst launch settings are configured to provide the smoothest out of the box operation for optimum performance activate Memory Play Click the Advanced button in the control bar to reveal the Memory Play button or select Memory Play from the Music Server menu The many customization options in Pure Music for preferences may seem overwhelming The factory settings were carefully chosen to give the best performance Before activating a new feature or changing a default setting read the pertinent section in this User s Guide to understand its function Factory default settings may be restored by pressing the Defaults button in the Preferences window Pure Music User Guide Release 1 899 3 Configuring the Audio Output Device Select Audio Setup shift command A from the Pure Music menu or press the Audio Setup but ton in the Pure Music Preferences window The Audio Setup panel will be displayed Audio Setup Audio Plug Ins M Select Device From Application Strict Device Validation Output Input and Playthrough Special Options Output Device Integer requires Memory Play Preallocate and Supported Device Built in Output B 44 1 kHz B Current Built in Output Target 44100 Allow Device Hardware Control If Supported C Volume Mute O Enable Exclusive Access Hog Mode C Native Integer Format Support DSD Preferred Equivalent PCM Playback Rate Maximum 352 8 kHz 15 1 S
48. king Users who used Advanced Audio Setup configured to determine the audio device DAC wouldn t have encountered this issue e Minor refinement to track switching to avoid a situation that could cause a click to be emitted when automatically changing tracks 1 71 Corrected issue with omitted bookmark bundle identifier that caused bookmarks to display as di rectories Corrected inadvertent use of wrong build setting in 1 7 which prevented threaded sample rate changes from working properly Improvements to the Add FLAC feature Now only allocates enough threads that can be used at a time removing the limit on the number of FLAC files that can be added in one operation Corrected a side effect introduced by workaround in 1 7 for bad driver design of Steinberg MR 816 driver which unloads itself during sample rate changes We now try to anticipate a driver unload ing itself In 1 7 this caused normal audio devices to have their IO procs reset which could cause a brief noise to be emitted when the sample rate changes New Special feature to disconnect connect and or reconfigure audio devices on the fly with the Advanced Audio Setup window Pure Music User Guide Release 1 899 41 e Corrected issue that prevented the Attempt Only Power of Two Upsampling option to be ignored for 88 2 kHz tracks e New option to upsample only if audio file sample rate is 44 1 or 48 kHz e Made the Preallocate function available on computers wi
49. lay during a sample rate change for DACs that cannot switch sample rates or resynchronize quickly If your computer has a localized language voice installed it will translate and speak the sample rate using the selected in the computer s Speech control panel language Advanced Music Server Preferences Preferences Processing Load lt 1 Audio Settings Music Server Settings Registration Basic Advanced Special The original default settings are best for new users Please read option descriptions in the User Guide before changing settings Upsampling Upsampling Method Maximum Fidelity NOS Type Classic M Only Upsample 44 1 or 48 kHz Audio C Attempt Only Power Of Two Upsampling Alw ample Redb kt 192 kHz if su 4 ported by DAC C Invert Audio Polarity when invertpolarity tag is detected Invert polarity for tracks with the string invertpolarity in the Tunes Comment tag O Observe iTunes per track Volume Adjustment Setting Pure Music User Guide Release 1 899 12 UPSAMPLING METHOD The NOS Type Classic option uses a less stringent reconstruction filter that aliases causing a form of signal distortion in the audio band similar to that produced by a non oversampling DAC without a reconstruction filter Maximum Fidelity upsamples without distortion If playing audio when switching this setting the volume will be muted briefly ATTEMPT ONLY PO
50. mode because audio coming from other applications is supplied in floating point format Pure Music User Guide Release 1 899 28 Special Audio Setup Options Audio Setup i Audio Plug ins M Select Device From Application F Strict Device Validation Output Input and Playthrough Special Options Special Options Read Description in User Guide Before Changing Settings C MOTU Traveler Secondary Output Streams Limit Rate 384 kHz DSD Setup CAUTION Read Description in User Guide Before Changing Settings C DSD Streaming Device Copy Current Output Device Name q Press the Click to Apply Changes Button to Finalize Device Flag O AAAA OSFA LIMIT MAX RATE will limit the maximum sample rate of the output in case the DAC is driven via a digital audio output that supports sample rates greater than the DAC s maximum supported sample rate It would be extremely unusual to need to change this from the default setting of 384 kHz It s intended for uncommon cases when a digital audio output such as from a Lynx AES HiFace or RME FireFace is capable of exceeding the sample rate of a DAC connected via S PDIF optical toslink or AES EBU For example if the digital output device supports 192 kHz and the DAC only up to 96 kHz this should be set to 96 kHz Note despite published specifications to the contrary the built in optical digital output of a Mac computer is limited to 96 kHz MOTU TRAVE
51. mple but ton will be disabled Upsampling is most useful if the playback DAC or audio interface supports a sample rate of at least twice the sample rate of the audio file Upsampling is automatically bypassed if the sample rate of the music file matches or is greater than the sample rate setting of the audio hardware Pure Music reads the sample rate at launch time the target rate and will not resample to a higher sample rate e The currently playing track can automatically be reloaded in native sampling vs upsampling mode when switching between modes facilitating A B comparisons e The sample rate of the audio output when Pure Music launches is the upsampling target rate If a file is encountered with a higher sample rate than the upsampling target rate an attempt will be made to set the audio output sample rate to the file s sample rate For example if you set your audio interface DAC to 176 4 kHz and then launch Pure Music Up sampling mode will cause all files with sample rates below 176 4 kHz to be upsampled Files at 176 4 kHz and higher such as 192 kHz will be played at their native sample rate if supported by the audio interface DAC Whether in Upsampling mode or not when you Quit Pure Music your audio interface will be reset to the sample rate that was in effect when Pure Music was launched Upsampling Off pu A 44 1 kHz 44 1 kHz 44 1 kHz 48 kHz 48 kHz 48 kHz 88 2 kHz 88 2 kHz
52. n Advanced Audio Setup uses same data as processing load value e No longer hides Preferences when opening Advanced Audio Setup it can be useful to have both panels open e Checks format of activation code and strips spaces or excessive length such as code having been pasted twice e Improvement to dithering e Optimizations to sample rate switching e Additional optimizations and other changes 1 63 KNOWN ISSUES e Sometimes when playing gapless tracks after transitioning to a following track a short snippet of the track will repeat at the beginning A work around is to reduce the setting of the MEMORY PLAY dial to 1 o clock or less 1 62 e Ignores Track Number tag attribute for Gapless tracks if not present Pure Music User Guide Release 1 899 44 e Compiler feedback directed performance optimizations 1 61 e Now indicates in the meter bar if the invertpolarity tag is detected for a track e Corrected problem preventing manually disabling the volume dithering when the volume was less than 0 dB e Corrected problem introduced in 1 6 that could cause the crossover bus time alignment to be disabled e Now retains the device and settings selected in Advanced Audio Setup even if the device isn t available for example if it s disconnected Then will use device configuration from AMS If the device selected in Advanced Audio Setup becomes available again it will be used e New option to announce
53. n such as the free Max Max also allows adding album art work during the conversion process Linn provides instructions on their website for using Max to convert their high resolution FLAC downloads to iTunes compatible formats http www linnrecords com linn studio master downloads itunes aspx ALLOW MANUAL PLAY OF UNCHECKED TRACKS IN ITUNES In either Pure Music and iTunes unchecked tracks are skipped during automatic track sequencing This option will allow manually playing an unchecked track by double clicking it or selecting it and pressing Return on the keyboard However any subsequent unchecked tracks will be skipped the same as the behavior of iTunes COMPATIBILITY WITH ITUNES 10 HORIZONTAL BUTTON STYLE If iTunes 10 preferences have been modified to use the horizontal style window control buttons selecting this option will maintain proper alignment of the iTunes and Pure Music docking windows Pure Music User Guide Release 1 890 19 FLAC DSD File Playback This innovative feature Patent Pending permits FLAC and DSD dff and dsf files to be organized in iTunes playlists and played back in Pure Music without needing to convert the audio file to an iTunes compatible format or having to rely on unsupported third party kernel extensions Proxy File Pointer Method For Redirecting Access for Incompatible File Formats Prov No 61 427 520 filed December 28 2010 Pub No US 2012 0165965 A1 filed June 21 2011 D
54. nated issue causing a small amount of disk i o to occur in between tracks on a gapless album from Pure Music re validating track format unnecessary because tracks are already vetted when loaded e Fixed a very subtle issue that occurred when playing a track with a sample rate unsupported by the audio device DAC without Upsampling engaged The issue caused the sample rate to be set to whatever the previous track happened to be playing and the audio resampled to that rate instead of selecting a more suitable target rate e Added new option to disable all scrolling text useful for a VNC control situation where transmit ting screen updates causes high overhead e Fixed an issue with iTunes 10 causing the Pure Music docking window not to track the iTunes win dow position e Added new menus menu commands keyboard shortcuts for configuring the meter signal pro cessing options track info display and activating the Preferences or Advanced Audio Setup panels e Menu for metering to monitor a specified output bus to include any level shifting done by plug ins or crossover if applicable or monitor the Master bus pre crossover Normal setting is Bus 1 e Slightly modified the volume control dithering e Improved output channel mapping compatibility with Prism Orpheus e Fixed a problem introduced in 1 63 that could cause parts of the beginning of a track to occasion ally repeat in Gapless mode Pure Music User Guide Release 1 89
55. ned on launch unless Automatically Open Settings is unchecked Pure Music User Guide Release 1 899 30 Settings can be changed using the sliders or a specific value can be typed in After changing the plugin settings click Save Settings to preserve the settings across sample rate changes during the same session and between launches of Pure Music Each plugin in each popup menu will have its own unique set tings preserved For example if four instances of Parametric EQ are opened using four pop up menus and Save Settings is clicked in each settings window the unique settings automatically will be applied to each Parametric EQ on the next launch Advanced Audio Setup Plug in 01 ASE Audio Unit AUParametricEQ Manufacturer Apple Device Selection Audio Plug ins i Parameters __ Bypass All Plug ins CPU Load Center frequency 20 0 47 520 eL77 Plug In Bus Bypass Q 1 0 aG 20 0 3 34 i i 20 0 am Ga 20 4 64 01 Apple AUParametricEQ E 1 a gen 20 0 20 0 64 dB 02 Apple AUParametricEQ E 1 e a l _Save Settings 03 Off wma wm O 04 Off HO a O Plug In 02 os Off E 1 A Audio Unit AUParametricEQ Manufacturer Apple 06 Off 3 a Parameters 07 off A 1 3 center frequency 20 0 47 520 49 25 Hz 27 Q 10 20 0 3 89 08 off 3403 0 gain 20 0 ees 20 0 3 19 dB 09 off a Aa C 10 Off 3 j z _ Save Settings 11 off ae 0 ETT ae TOU KAZ TOF2T Academy OF St Marena the
56. nternal position marker in Pure Music causing Pure Music to think the user had changed the playhead position by one second when the user hadn t the workaround was to disable the Update Track Play Position in iTunes option e Recalibrated the MEMORY PLAY dial to reserve slightly more RAM for OS use e Eliminated problem introduced in 1 41 that could cause the Allow Manual Playlist Navigation option for the Remote app from functioning as expected e Low fidelity audio files with sample rates less than 44 1 kHz now play with proper speed e Activating Update Track Play Position didn t immediately enable the option as it took effect on the next track played Now it takes effect immediately e Track order based on album track number is verified before loading gapless tracks so gapless Pure Music User Guide Release 1 899 45 tracks arranged out of order in a playlist are played singly e Improved the behavior of plug ins having long latency by flushing stale samples when switching tracks e Performance optimizations including eliminating redundant time alignment and NetSend code e Faster loading of Gapless tracks e Other changes 1 6 NEW FEATURES e Meter bar track information display now renders diacritical marks and many other non English and multi byte characters as shown below ohern Sph ren Mahler Symphony No arn Prelude Song of the Yellow River Boatman Note please let us know preferably in
57. o output devices implementing hardware gain control If detected the Pure Music User Guide Release 1 899 24 Volume and or Mute check boxes will be enabled these will only be enabled updated after chang ing the device and clicking Apply Changes When these options are activated both the Pure Music Monitor control and the iTunes volume control except in Less is More Mode will directly control the hardware gain features The Monitor calibra tion scale will be hidden and the text HW Vol will appear in place of the gain setting indication below the Monitor control The internal gain will automatically be set at 0 dB for a bit perfect audio transfer presuming signal processing options aren t used and the volume control dithering bypassed ENABLE EXCLUSIVE ACCESS HOG MODE This option reserves the audio device for Pure Music s exclusive use while Pure Music is running IMPORTANT As a precaution Hog Mode cannot be used for the audio device designated as the preferred device in Apple s Audio MIDI Setup application AMS The audio device assigned for Out put in AMS should be set to a different device than the one used by Pure Music to allow iTunes or other applications full time access to an audio output device if needed Just selecting the device in AMS isn t enough the pop up gear menu must be used to assign the small output loudspeaker icon to the device See instructions under Playthrough
58. o sample rate Pure Music User Guide Release 1 899 42 e Eliminated issue preventing Dynamic Range meter from being updated properly if Output was monitored instead of Input e If track sample rate is greater than a rate supported by DAC and is downsampled for playback the track will be played from disk e Can change the Limit Rate setting on the fly in Advanced Audio Setup without having to click Apply Changes e If audio file has higher sample rate than supported by the audio device attempt will be made to only downsample during playback to an even power of two rate supported by the audio device e Random track seeking in the Tunes interface is disabled if the track is played with downsampling track has a higher sample rate than supported by the audio device e New button to restore application preferences to defaults preserving or optionally deleting any entered activation code A copy of the previous Preferences file will be made to allow restoring old preferences e Holding down the Option key on the keyboard while pressing the restore preferences button will reveal the preferences file on the desktop in a Finder window user s home Preferences folder e Faster audio device tear down resulting in faster Quit 1 65a e Issue with 1 65 distribution corrected incorrectly reported new version available 1 65 October 12 2010 e Fixed minor problem keeping Invert button state from being saved across launches e Elimi
59. option command R An alternate way to access the application Preferences Also a menu option command command comma The default Preferences settings are shown below Pure Music User Guide Release 1 899 11 Basic Music Server Preferences Preferences Processing Load lt 1 Audio Settings Music Server Settings Registration Basic Advanced Special All of the original default settings are best for new users Please read option descriptions in the User s Guide before changing any settings C When Ready to Play Announce Sample Rate Beep mM Announce Sample Rate Changes AA 5 Dialog Only System Audio Main Audio Volume gt WHEN READY TO PLAY Optionally beep or announce the sample rate via the audio device selected for System Sounds in Audio MIDI Setup when Pure Music has finished launching and is ready to interact with iTunes This can be handy in a headless music server system If the System Sounds device is the same one used for the main audio playback the Monitor volume setting is taken into account when announcing the sample rate if using that option ANNOUNCE SAMPLE RATE CHANGES Announce sample rate changes using either a dialog box or a voice announcement in the System Audio usually the built in computer speakers or the main audio system automatically adjusted for relative playback volume This feature also adds a slight extra de
60. pace bar The iTunes volume control skip forward back and other features of iTunes will be usable When using the volume control in iTunes the volume setting is mapped to a corresponding volume setting in Pure Music the iTunes maximum setting is mapped to 0 dB in Pure Music iTunes is not controlling the volume because it isn t playing the file With the Monitor setting in Pure Music at 0 dB the original audio isn t altered at all you get direct bit perfect playthrough via a lossless 64 bit audio kernel to your high end DAC About Pure Music Feature Descriptions Pure Music uses iTunes as a music database and user interface while all audio is rendered and played via Pure Music s low CPU overhead audiophile quality 64 bit resolution playback engine Note 64 bit resolution audio is an entirely different thing than the 64 bit memory addressing supported in Apple s Snow Leopard OS 10 6 and later OS versions Trivia the iTunes music server feature for playing high resolution audio was first introduced well over 5 years ago in Channel D s Pure Vinyl 2 0 The Pure Music application was created to answer requests for a more economically priced package for users not interested in the vinyl oriented recording features of Pure Vinyl The music playback engine is exactly the same and is built from the same source code as Pure Vinyl The benefit of this arrangement is that improvements to Pure Vinyl playback and performance will make
61. psampling 88 2 kHz tracks to 96 kHz for situations where the audio device doesn t support 88 2 kHz e g pre 2010 Mac built in optical output Moved Invert button to immediately below the Monitor control to better reflect its function of modifying the audio signal e New option to dictate if the Comment tag in iTunes for the track includes the string gaplessbreak where best to break up a gapless album if insufficient memory is present to load the entire album e New option if the Comment tag in iTunes for the track includes the string monophonic to play such Pure Music User Guide Release 1 899 39 tracks mixed to mono e 33 more efficient memory usage with gapless albums e Corrected issue that could cause a snippet of a previous song to play if playback was paused and a song with a different sample rate is played e Now observes setting of Repeat One in iTunes for selected track in any playlist e Improved operation of NetSend connect on launch and disconnect options e Eliminated side effect that occurred when Adding FLAC files causing the last track added to start playing e Corrected issue with gapless playback involving album boundaries e Corrected all known issues involving Gapless playback e Corrected a problem causing more than one gapless album to load at once e Corrected problem causing noises to be emitted during playback of gapless FLAC tracks e Corrected issue that could cause certain mono tracks to only play in
62. r interface for Music Server Preferences e Added menu commands and some keyboard equivalents for starting Less is More mode Reset and included a Reset Windows command in case the windows become positioned off the screen 1 44 e Corrected an issue introduced in 1 42 that could cause play to halt after playing the first in a group of gapless tracks 1 43 e The primary output bus was inadvertently and incorrectly set to Off in the default settings of Pure Music 1 42 causing the symptom of no sound output This release insures the output bus is en abled by default This problem would only occur for first time Pure Music users who started with Pure Music 1 42 See the Troubleshooting section of this document for more information about en abling the output bus if the output is silent 1 42 e Faster iTunes launch mechanism e When quitting Pure Music iTunes volume control state is restored This is the same as manually nudging the volume control in iTunes after quitting Pure Music but was a cause of confusion to users thinking iTunes was still controlled by Pure Music even after Pure Music quits e Dither algorithm reverted to 1 4 version e Improved memory management e Corrected a problem that could cause a sudden quit under limited memory conditions double free could be performed on a rendering buffer e Improved iTunes handshaking including eliminating a problem that could cause occasional skipping Pure Music
63. rrow keys At Monitor volume settings below 0 dB dithering may optionally be applied A 64 bit pseudorandom number generator PRNG with an extremely long sequence repeat length is used to generate the dither in real time instead of using a canned repetitive dither sequence The Uniform dither option is the suggested choice and the optimum setting of the slider is 0 75 LSB The LSB word length should be set to 24 Bit 6 0 unless using a DAC with only 16 bit resolution unusual or capable of 32 bit integer eee word length very unusual Many audio interfaces simply report the CoreAudio 32 bit float format in Audio MIDI Setup instead of the DAC s true internal integer format Pure Music User Guide Release 1 899 el The Amplitude word length setting 16 24 32 only affects the dither amplitude All volume adjustments in Pure Music are made at 64 bit Noise Shaping Caution Higher Order Shaping Consumes CPU Uniform C BW Limit 4th Order 8th Order 12th Order M Dithered Volume Control resolution regardless of the Amplitude setting f Amplitude LS8s O 0 75 O16 bit 24 bit O 32 bit Other options are provided for those who prefer noise shaped dither Moving from the Uniform M Stereo Channels Dithered Independently to the 12th Order Noise Shaping options the dither energy becomes shifted to increasingly higher frequencies and a narrower frequency range Significantly more CPU cycles will be cons
64. s fm Beethoven One 96 kbps Abacus fm Beethoven One plays the compositions of Beethoven STORE F Abacus fm Classical One 128 kbps Abacus fm Classical One plays Classical music from the worlds gre El Tunes Store Abacus fm Mozart Early Sy 128 kbps Abacus fm Mozart Early Symphonies plays music composed by Mo Purchased Abacus fm Mozart Piano 128 kbps Abacus fm Mozart Piano plays Mozart compositions for piano 4 Downloads gt Abacus fm Vintage Jazz 128 kbps Abacus fm Vintage Jazz plays jazz from the 1920s to 1940s SHARED ABC CLASSIC 128 kbps A to Z of classical music La musique classique de A Z F ABC OPERA 128 kbps Only Opera reanic The Pure Music sidebar will shrink to a shorter length hiding Memory Play and other options not applicable to Playthrough Internet Radio can be played from iTunes or other applications including movies to hear the audio through Pure Music The output volume will be a combination of the Pure Music volume control and the audio source application volume for best results set the audio soruce volume to maximum and control the volume in Pure Music Exercise caution when returning to Audio File Player Mode if you have changed the volume control setting in the audio source The Constrain Sample Rate feature of Playthrough enabled by default provides better synchroniza tion between most audio devices and external sources by keeping the sample rate at 44 1 kHz Playthrough is not compatible with Integer
65. sis and signal processing products See our website at http channld com purevinyl pure vinyl specs html for comparisons of the quality of the Channel D SRC with other sample rate converters Converted files are saved to the same location as the originals with the sample rate appended For example a file called Track 2 that s converted to 44 1 kHz will be saved as Track 2 44 1 Note the Add FLAC DSD format and sample rate converters are multithreaded and will use all CPU cores on your computer for extremely fast throughput Pure Music User Guide Release 1 899 22 Less is More Controller Mode Less cs Woe Us e lo Ny U Y N j Pare amp Memory Play Egasamplng Sale PA Less is More Controller Mode Command L on the keyboard disconnects Pure Music from auto matic iTunes interaction reducing the CPU footprint for those desiring a purely minimalist approach to audio file playback a high performance car with the upholstery removed Note this was the same method used in the original Pure Vinyl 3 Preview Release 1 iTunes Music Server before our innovative iTunes handshaking was added Important Except for the Selected button all navigation and play control must be performed using the Less is More Controller In Less is More Mode the Remote app for iPhone iPod will not func tion with Pure Music nor will the volume control in iTunes If the Play button is pressed in iTunes iTunes will
66. sless files will be skipped but other audio files will be converted to Apple Lossless preserving the original resolution and sample rate Pure Music Convert to Apple Lossless Drag and drop audio files or folders into this window This operation creates copies of files original is not altered Active I O Threads 0 Remaining 0 Cancel 3 File Sample Rate Converter Pure Music Sample Rate Conversion SRC Drag and drop audio files or folders into this window This operation creates copies of files original is not altered Active I O Threads 0 Remaining 0 Cancel Mastering Quality Sample Rate Converter SRC Convert 192 kHz to Q 44 1 kHz 48 kHz 96 kHz Convert 176 4 kHz to 44 1 kHz 88 2 kHz Convert 96 kHz to 44 1 kHz 48 kHz 88 2 kHz will be resampled to 44 1 kHz Pure Music s Apple Lossless conversion maintains original resolution 16 24 32 bit Output Resolution 16Bit 24Bit 328it Original Audio files can be sample rate converted to lower sample rates for playback on hardware that might not support the original sample rate Select Audio File Sample Rate Converter from the Pure Music menu Drag audio tracks folders to the window to convert to Apple Lossless with sample rate con version The converter uses a proprietary extremely fast and high quality no subband aliasing digital filter ing and resampling algorithm developed by Channel D and used in our other audio analy
67. ss than 64 bits of precision and the hardware logic circuitry needed for implementing the proper complicated reconstruction filters requires a prohibitively large and expensive amount of chip area Detailed information is available on our website concerning the quality of our upsampling algorithm Automatic monitor volume tethered dithering is applied if enabled for monitor volume settings qui eter than 0 dB for lower distortion compared to undithered volume Pure Music User Guide Release 1 899 6 NetSend allows streaming up to 384 kHz 24 bit uncompressed audio to up to four other computers each of which can output multiple audio streams for distributed audio This can be used in conjunc tion with Pure Music s upsampling Gapless playback is included with Memory Play This includes the ability to randomly seek through the group of loaded tracks in memory via the iTunes skip back or skip ahead controls A Dynamic Range monitoring feature shows the difference between Peak and RMS using broadcast standard Leq style measurement the same as used in Channel D s AudioLeak audio loudness analysis application Music files afflicted by the loudness war will show smaller dynamic range values Pure Music can play DSD and FLAC files Such files will appear in your iTunes library making them as conveniently accessible for creating playlists shuffle play etc as other tracks in iTunes Finally the CPU footprint of Pure Mus
68. talled e High quality multithreaded sample rate converter from Pure Vinyl now incorporated for downsam pling tracks from 192 176 4 96 88 2 to lower sample rates for playing back HD downloads if your hardware doesn t support the sample rate of the tracks e Super fast multithreaded file converter convert other file formats including FLAC to Apple Loss less preserving original bit depth and with or without simultaneous sample rate conversion e Eliminated issue causing invertpolarity tag to be ignored after a fresh launch and first loading Gapless tracks e New option for monochromatic skin to user interface e Sample rate changes and device reconfiguration are now done partly from a pre emptive thread with audio fade to minimize transients when changing tracks manually e Removed the Memory Play dial this was intended to be a somewhat informative display but ulti mately proved to be distracting now is fixed at a 3 o clock setting application memory usage may be monitored in the Apple Activity Monitor application e Anticipates issue that could occur with some device drivers that improperly unload themselves when performing sample rate changes Steinberg MR 816 Prevents freeze with such audio devices but sample rate changing behavior with such audio devices is still not performed smoothly e Eliminated an issue causing silence or skips in audio between gapless tracks for long tracks upsam pled to a non power of tw
69. te all of these improvements new features and performance enhancing Pure Music up dates have been free since Pure Music 1 0 March 2010 1 898 R3 May 17 2013 NOTE not configured for automatic version update notification e Compatibility update for iTunes 11 0 3 which was released May 16 2013 e Corrected issue causing wrong playback speed for first track played in some scenarios e CM DSD Driver support 1 89gR1 e Reduced magnitude of CPU spike when loading a track with Hybrid memory 1 89g includes changes in 1 89bR2 and 1 89bR3 e Ensure that the playback buffer is completely flushed to the output device when finished playing a single track e Made the Manually Adjustable track play position option enabled by default 1 89bR3 not released publicly e Corrected 1 88a regression issue causing noises between FLAC or DSD tracks when using Hybrid memory play and using slower media storage devices 1 89bR2 not released publicly e Corrected issue with crossover gain of the high pass section would change if the turnover fre quency was changed more pronounced at lower sample rates NOTE version revisions 1 89a and 1 89b were not configured to activate automatic update notifica tion changes only involved a few specific issues that most users would not encounter 1 89b e Corrected issue with file sample rate converter when using the file sample rate converter if the user dragged a 48 kHz this was not supported and
70. ted into Pure Vinyl 3 1 not a public Pure Music release e Corrected playback issue involving 48 kHz tracks and the Fostex DAC which only supports 96 kHz e Corrected issue causing distorted audio when playing FLAC files when the hardware doesn t na tively support the file sample rate e New option to automatically switch to Playthrough mode if an iTunes Internet radio stream is played and switch back to File mode if a music track file is played e With the above new Playthrough option enabled Pure Music will automatically switch to Playthrough mode if an iTunes 128 kbps DRM track is encountered permitting playing Protected tracks Will switch back to File mode if a normal music track file is played Previously such tracks were skipped e Improved performance of Playthrough regarding device synchronization e Improved Reset Window Positions menu command to work more reliably e Eliminated transient sound that could occur when switching to a normal PCM track from a DSD track playing in PCM mode e Can play CDs directly without needing to rip to hard drive CDs can be ejected while playing and a new CD inserted Memory Play must be enabled which will automatically play provided prefer ences are set in iTunes to automatically play inserted CDs e When files must be downsampled due to audio hardware limitations will downsample to the next power of two instead of the next lower sample rate e Eliminated necessity of stopping the audio devic
71. th less than 3 GB free RAM Will always leave at least 768 MB free RAM for use by other applications though other applications except for iTunes should not be launched or used when the Preallocate option is used e Using Preallocate improvements to Upsampling and reduced CPU footprint Now show Memory dial when Preallocate option isn t being used or available e Significantly improved efficiency of memory play now can load twice the duration compared to Pure Music 1 7 of Redbook CD tracks and 25 more 24 bit audio Maximum size of a single CD format track that can be loaded with Memory Play is now 3 hours provided that enough RAM is available of course This also has beneficial effects on performance because memory fetches during playback are greatly reduced compared to earlier versions for the same track s 1 7 December 31 2010 e Eliminated issue causing sample rate change to be announced when playing tracks with higher sample rate than supported by device e Loosened constraint on maximum size of single track loaded to memory was 60 minutes at 44 1 kHz now is 90 minutes at 44 1 kHz or 20 minutes at 192 kHz this will be further improved in a future release e Support for FLAC playback in Pure Music from iTunes library playlists without requiring any sys tem extensions or alteration or conversion of the FLAC files e New option to Preallocate Buffer for memory play at launch for computers with 4 GB or more RAM ins
72. the Audio Setup window You must validate as an administrative user same as required during installa tion The driver will be removed immediately Type your password to allow Uninstall Channel D PAD app to make changes Name A Details Pure Music User Guide Release 1 899 27 USING PLAYTHROUGH Select Audio Playthrough from the Music Server menu or press shift command P If Automatically Activate is checked Playthrough will automatically be activated when playing Internet Radio sta tions in iTunes or if an old style 128 kbps DRM Protected track purchased from the iTunes Store is played Tala Metering i Toggle Less is More Mode L Reset Handshaking SER Reset Window Positions Hide Music Server Controls 3H Upsampling THU Y Memory Play CHM Invert CHI v Headless Operation Only Use Remote App 3H Audio File Player EP Audio Playthrough CHP Disable DSP Options Except Upsampling Mono and Invert Disable DSP Options Abacus fm Beethoven One ata No 6 in A major Op 30 1 1 Allegro Martha Arc ee Stream a Bit Rate Comments LIBRARY J Music gt Adult Contemporary Movies gt Alternative Rock E TV Shows gt Ambient Podcasts 14 gt Blues E Books b Classic Rock EJ Apps Y Classical 142 streams 7 A1900 Classical 128 kbps The best of classic Music Le meilleur de la musique classique 9 gt Abacu
73. the left channel e Corrected issue that could cause playback to pause unexpectedly 1 74a e Corrected issue with adding FLAC files in which the album artist tag was interpreted as the album tag e Corrected side effect of not writeable alert causing FLAC album and artist to be incorrect For this and the previous issue above adding the tracks again will replace the incorrect tags which will be updated in iTunes the next time the affected tracks are played unnecessary to delete any tracks or bookmark files e Corrected issue playing snippet of previous track with Less is More mode if sample rate changes e Corrected issue where Only Upsample 44 1 and 48 kHz ignored this setting for 48 kHz tracks 1 74 e Preallocate now usable on most computers with 2 GB or more RAM installed previously required at least 4 GB RAM installed provided that Pure Music is launched following a system restart e Corrected issue when using Preallocate which could cause a short snippet of the previous track to play if playback is paused and another track having a different sample rate then is started playing e Corrected issue causing clicks to be emitted when using the new factored upsampler with Preallo cate enabled e Corrected issue preventing metering from being disabled across launches if Advanced mode in the sidebar was turned off e Alerts user when adding FLAC tracks if the source volume is not writeable e Removed requirement of ne
74. their way to Pure Music and vice versa Pure Music also offers a memory play mode for minimum CPU and disk activity during playback Also unlike iTunes Pure Music automatically switches your audio hardware to match the sample rate of the music file being played no resampling A Hybrid memory play mode provides fast track load ing and playback see description of options below A 2 3 4 way crossover is included as is full support for AudioUnit Plug ins Many plug ins are included for example graphic and parametric EQ or third party plugins can be installed as well many free and useful AudioUnit plug ins are available on the Internet Plug ins can be applied selectively to the crossover outputs Optional high quality real time 64 bit upsampling is available to play back CD quality audio at the highest sample rate and resolution of your audio interface DAC delivering all of the benefits upsam pling brings DAC phase shift moved above the audio frequency range etc We have received comments that Upsampling adds air to solo instruments and improves timing and transient attack Real time upsampling permits experimenting with different settings without having to commit the time or especially disk space for creating redundant upsampled copies of audio files as is the case for file based upsampling If you ve avoided hardware upsamplers in the past software upsampling is different Available upsampling hardware operates with le
75. ts the Keep Mini Player On Top option should be enabled in iTunes from the Advanced tab in the iTunes application Preferences Mi Monochromatic UI Skin Helvetica Take effect on next launch Activate Less is More mode Disable iTunes Interaction Command L MONOCHROMATIC UI SKIN Draws the control buttons in gray tones HELVETICA Draws the control buttons using the Helvetica font instead of the default Arial font Use this option if the Arial font is not available on your system buttons will be drawn without text labels ACTIVATE LESS IS MORE MODE Please see the section of the User s Guide covering Less is More mode for more information Special iTunes Preferences Basic Advanced Special The original default settings are best for new users Please read option descriptions in the User Guide before changing settings Application _ iTunes iPod Touch iPhone iPad Remote App Don t activate unless using Remote App M Update Play Position in Remote App Only should be used with the Remote App see User Guide for more information M Allow Manual Playlist Navigation Note Only Uncheck for Headless Server Control using Remote App Don t uncheck this if you want to manually navigate through playlists UPDATE PLAY POSITION IN REMOTE APP This option provides feedback in the iPhone iTouch Remote app updating the play position in the Remote app Pure Music also must be brought to the front for
76. twork from FLAC files to Bookmark tracks Depress the Caps Lock key on the keyboard and the Add FLAC operation will add art without re creating the bookmark tracks the next time a track is played the artwork will appear in iTunes e Support for 128Fs DSD playback using dCS DSD scheme for DSD DACs supporting 352 8 kHz 1 83 e Option to automatically set the Channel D PAD as the output device for playthrough don t have to set manually in AMS and restore previous device when quitting e Remembers state of Playthrough across launches e UI now uses the Arial typeface for buttons e Pure Music can play flat vinyl recordings track bookmarks made with Pure Vinyl and auto matically apply the RIAA correction curve e New option to whitelist a DAC as supporting streaming DSD using dCS protocol e Support for 128Fs streaming DSD using dCS protocol DAC also must support 352 8 kHz e Option for Scheme 2 DSD alternating flag byte as proposed by ad hoc DSD working group e Corrected problem causing 128Fs dff track bookmarks to have the wrong duration e Corrected problem causing Add FLAC to skip folders when more than one individual folder is dragged no previous issues with folders that were enclosed in folders e Change tag label in proxy files from Pure Music Compressed Bookmark to Pure Music Bookmark Pure Music User Guide Release 1 899 37 e Keep PAD from showing up in output device menu e Show installed PAD vers
77. umed when using noise shaped dither Stereo uncorrelated dithering uses dual PRNGs to generate the dither independently for each chan nel Deselecting this option causes the same dither to be applied to both channels The Stereo setting is recommended INVERT Inverts the absolute signal polarity phase of the audio both channels and also can be done by pressing the i key on the keyboard with Pure Music in front There may be a brief disturbance to the audio when the option is activated deactivated Note if you d like to invert just one channel of the audio for testing purposes this can be done in the Multichannel sub tab of Audio Settings in the Preferences If using the invertpolarity tag feature to invert track polarity on a per track basis the polarity will be the combination of the setting of the INVERT button and the invertpolatiry tag Therefore if INVERT is active and a track has the text invertpolarity in the Comment field the net result will be no polarity inversion NETSEND The button is visible if selected in the NetSend tab of the Preferences Please download the separate NetSend document from our website www channel d com Downloads page for complete instructions on using this feature QUEUE SELECTION When activated the track selected when the current track or group of gapless tracks METE is finished playing will be played next This can be used for on the fly playlist chan
78. unes 1 Open the Add FLAC or DSD Files window press command F or select from the Pure Music menu The Tunes window will automatically be minimized to make the next step easier 2 Drag and drop the FLAC DSD music tracks or folders into the window Looking For A Home ott Pm O 4 GDA Pure Music Add FLAC or DSD to Tunes Drag and drop audio files or folders into this window _ All dragged tracks are part of the same album important Uncheck the Keep Tunes Media folder organized and Copy files to Tunes Media folder when adding to library options in the Tunes application preferences Advanced pane before dragging FLAC or DSD files to this window gt O Music Active 1 0 Threads O Remaining 0 gt 3 Applications Pure Music will allocate as many file processing threads as processor cores on the computer for maxi mum throughput This also benefits from the Hyperthreading capability of the latest CPUs doubling the effective number of processor cores Pure Music User Guide Release 1 899 20 Pure Music Add FLAC or DSD to iTunes Drag and drop audio files or folders into this window Files may be dragged into window while processing is in progress wnload a O pin o LIBRARY H Movies E Tv Shows FP Podcasts 152 Books E Apps 0 Radio STORE E Tunes Store Q Ping Purchased 4 Downloads 8 0 Dithered
79. xamples below show Pure Music behavior for different settings of Set Upsampling Target Rate Ceiling Upsampling On Target Rate 96 kHz Target Rate Ceiling Disabled Audio Fils Sample Rate Audio Supports a a e 44 1 kHz 96 kHz 96 kHz 48 kHz 96 kHz 96 kHz 88 2 kHz 96 kHz 96 kHz 96 kHz 96 kHz 96 kHz 176 4 kHz 96 kHz downsampled 176 4 kHz 192 kHz 96 kHz downsampled 192 kHz With the option off the normal setting and using the above example the software will attempt to set native sample rate for files with sample rates over 96 kHz Other sample rates will be treated as above Upsampling On Target Rate 96 kHz Target Rate Ceiling Enabled Aido Bile Spk Bara Audio o Supports a a ae 44 1 kHz 96 kHz 96 kHz 48 kHz 96 kHz 96 kHz 88 2 kHz 96 kHz 96 kHz 96 kHz 96 kHz 96 kHz 176 4 kHz 96 kHz downsampled 96 kHz downsampled 192 kHz 96 kHz downsampled 96 kHz downsampled If you want to change the target rate after starting a playback session this can be done with Pure Music s Advanced Audio Settings feature ENABLE VINYL 45 ANIMATION Reveals the Animate button in the control sidebar if Advanced control mode is also active Pure Music User Guide Release 1 899 16 AUTOMATICALLY USE MINI CONTROLLER IN ANIMATE MODE When Animate mode is enabled the iTunes application window will be shrunk to the iTunes Mini Controller For best resul
80. y plug ins applied on All signal Input Source 1 buses Output Bus 1 2 3 4 shows the output signal v Output 362 level on the four output buses This would include any Y Output Bus 1 0 1 aa Output Bus 2 032 signal level modification made by the Crossover and Output Bus 3 0383 bus Trim controls as well as any plug ins applied to specific signal Output Bus 4 024 buses Master Output 05380 ADVANCED Enables many of the options described here Pure Music User Guide Release 1 899 Fd A MUSIC SERVER MENU Most of the Toggle Less is More Mode i ds functions in this menu duplicate the func Reset Handshaking R tion buttons in the sidebar control panel Reset Window Positions A lida Music Server Gontrale 98H They provide control key menu equiva Hide All aH lents for convenience or use with third UNOS oxy Party remote controls Y Memory Play THM Invert 31 TOGGLE LESS IS MORE MODE see Less Headless Operation Only Use Remote App dH B More Mode description below RESET HANDSHAKING same function as RESET button described below Disable DSP Options Except Upsampling Mono and Invert RESET WINDOW POSITIONS if the Pure Disable DSP Options E i A Music docking windows become positioned off screen this will move them back to the main monitor HIDE MUSIC SERVER CONTROLS hides the Pure Music dock ing windows and opens small placard that tracks the Tunes window LIBRARY 3 v Name HIDE ALL hides Pure Musi
81. y the OS for automatic sleep as set by the Energy Saver System Preference panel Check this option if automatic sleep is required Note that many factors may interfere with automatic sleep during audio playback so this may not work under all circumstances Also different audio interfaces respond more or less gracefully to a sleep request which may sometimes cause unexpected behavior Sleep can be activated manually at any time with the Apple menu Pure Music will pause music play back and attempt to close the connection to the audio device On wake from sleep Pure Music will attempt to re establish a connection and resume play if originally playing SET UPSAMPLING TARGET RATE CEILING AT LAUNCH The normal setting for this option is off With this option enabled files below the Target Rate will be upsampled files at the Target Rate see description of this term under Upsampling later in this document will play at the native rate and files above the Target Rate will be downsampled This set ting is provided for very unusual system setups in which the clock rate of the interface isn t Pure Music User Guide Release 1 899 15 externally controllable above a certain sample rate For example if the DAC is set to 96 kHz files at or below 96 kHz will be upsampled or played at 96 kHz while files above that rate will be downsam pled to 96 kHz If you don t understand the purpose of this option it should be left deselected E

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