Dolby Media Meter User`s Manual
Contents
1. Insert the iLok into an available USB port before opening the application The iLok key must remain in the USB port while the software is in use Note Customers updating from an older version can continue to use the same iLok authorization The iLok website enables to you to manage the licenses for all your iLok protected applications in one place To register your license 1 Goto ilok com 2 Follow the directions to sign up for a free account 3 Download and install the iLok client software Typical installations are a driver to support the iLok key and iLok website security drivers Log in to your account Synchronize your iLok with your account Dolby Media Meter Users Manual Using the PACE iLok 6 View the licenses on your newly registered iLok Note If you have been given license codes for your Dolby applications they can be 4 redeemed on the lok com site for download svnchronization to vour new or existing iLok kev 7 Add and edit the name of the iLok for differentiation if you own multiple iLoks Caution Do not lose your iLok Keep it as safe and secure as you would any other valuable piece of equipment Losing the iLok is the same as losing the entire product Consider Subscribing to iLok Zero DownTime Coverage The iLok Zero DownTime program enables iLok owners to immediately replace licenses in case an iLok is broken lost or stolen Visit ilok com for program details and2. Dolby Media Meter supports both real time and non real time applications The information in this section provides additional information on how to use Dolby Meter for users of e Dolby LM100 Broadcast Loudness Meter e Dolby DP600 or VM600 Program Optimizer Table A 1 Loudness Product Comparisons Dolby Media Dolby Media Dolby Media Meter Meter Meter Stand Alone AudioSuite VST LM100 DP600 VM600 Application Non real time Non real time Real time Real time Non real time Supported ITU R BS 1770 1 ITU R BS 1770 1 JITU R 5 1770 1 JITU R BS 1770 1 ITU R BS 1770 1 Algorithms ITU R BS 1770 2 ITU RBS 1770 2 ITU R 5 1770 2 ITU RBS 1770 2 ITU R BS 1770 3 ITU R BS 1770 3 ITU R BS 1770 3 ITU R BS 1770 3 ITU R BS 1770 3 Leq A Leq A Leq A Leq A Leq A Measurement Dialogue Dialogue Dialogue Dialogue Dialogue Method Intelligence or Intelligence or Intelligence or Intelligence or Intelligence or EBU EBU R128 EBU R128 EBU R128 EBU R128 R128 PCM Mono to 7 1 Mono to 7 1 Mono to 7 1 L R stereo Mono to 5 1 Dolby Digital Mono to 5 1 N A N A L R C stereo all Mono to 5 1 Dolby Digital Mono to 7 1 N A N A N A Mono to 7 1 Plus Dolby TrueHD to 7 1 N A N A N A N A Dolby E Mono to 7 1 N A N A L R C stereo all Mono to 7 1 A 1 Note For products that contain DC blocking and pre emphasis filters disable the filters to support ITU R BS 1770 3 For products
3. I DOLBY Dolby Media Meter User s Manual Issue 6 Part Number 9110860 Dolby Laboratories Licensing Corporation Corporate Headquarters Dolby Laboratories Inc Dolby Laboratories Licensing Corporation 100 Potrero Avenue San Francisco CA 94103 4813 USA Telephone 415 558 0200 Fax 415 863 1373 www dolby com European Licensing Liaison Office Dolby International AB Apollo Building 3E Herikerbergweg 1 35 1101 CN Amsterdam Zuidoost The Netherlands Telephone 31 20 651 1800 Fax 31 20 651 1801 Asia Dolby Japan K K NBF Higashi Ginza Square 3F 13 14 Tsukiji 1 Chome Chuo ku Tokyo 104 0045 Japan Telephone 81 3 3524 7300 Fax 81 3 3524 7389 www dolby co jp Dolby Laboratories Hong Kong Limited Unit 5407 Central Plaza 18 Harbour Road Wanchai Hong Kong Telephone 852 2519 0888 Fax 852 2519 8988 Dolby Laboratories International Services Shanghai Co Ltd 05 07a Floor 18 The Center 989 Chang Le Road Shanghai 200031 China Telephone 86 21 6113 3456 Fax 86 21 6113 3400 www dolby com cn Confidential information for Dolby Laboratories Licensees only Unauthorized use sale or duplication is prohibited Dolby and the double D symbol are registered trademarks of Dolby Laboratories Dialogue Intelligence and Dolby Digital Plus are trademarks of Dolby Laboratories All other trademarks remain the property of Part Number 9110860 their respective owners Issue 6 2014 Dolby Laboratories All r
4. the technical support window and click Close on the installer to complete the installation Dolby Media Meter User s Manual 3 Installing Dolby Media Meter 2 2 2 3 Installing Dolby Media Meter on a PC To install Dolby Media Meter on a PC 1 Download the software from www dolbycustomer com 2 Read the introduction then click Next 3 Click I accept the terms in the license agreement Click Next to proceed The Dolby Media Meter application and documentation automatically installs in C Program Files Dolby Dolby Media Meter then places icons on the desktop and under the Start menu Plug ins install in various locations as required by your digital audio workstation You should not change the location of these plug ins Note After installing Dolby Media Meter you must restart your PC before the program can be used Note Some applications such as Sony SoundForge might require you to navigate to the VST folder to begin using the Dolby Media Meter VST plug in VST plug ins are installed to C Program Files Steinberg VstPlugins on 32 bit operating systems and C Program Files x86 Steinberg VstPlugins on 64 bit operating systems Using the PACE iLok This application uses PACE iLok antipiracy software The license stored on the USB iLok key authorizes your system to use the application New customers should purchase an iLok from ilok com and obtain a coupon for an iLok authorization from their reseller
5. Understanding the Log and the Graph Dolby Media Meter enables you to view and save both a graph and log file for each measurement you make 5 1 Reading the Log When it processes source or encoded files Dolby Media Meter creates a log file containing a record of its measurements The log is created as a comma separated values csv file allowing you to open and save it in TextEdit Microsoft Excel or any other spreadsheet editor Dolby Media Meter 07 15 201318 21 20 L C R Ls Rs LFE Peak Count Threshold 10 Log File Path Users edgarostrowski Documents Sample_Log csv Infinite Dialogue Measurement Target WarningTarget 30Tolerance PlusiTolerance Minusl True Peak Value WarningMax 10 Figure 5 1 Sample Log File Beginning As shown in Figure 5 1 the log file begins with crucial information about the input It states the name and file location for the input file or files its audio coding mode whether Dialogue Intelligence is on or off and the chosen peak count threshold value Measured Dialogue Loudness Dialogue 30 9 dBFS Measured Overall Loudness No Dialogue 31 1 dBFS True peak 6 2 dBTP Speech content 90 percent Figure 5 2 Sample Log File End As shown in Figure 5 2 the log file ends with the measured loudness highest peak and the percentage of speech content for the entire file or file set In between the log lists several attributes for each second of real time e Timecode Indicates the section of the f
6. a He 19 sample bog File End onte Uv t UR lk i Ba IDE RUE RR 19 sample Graphis za doi RE oda a Eda 20 Dolby Media Meter User s Manual iii List of Figures Confidential Information iv Dolby Media Meter Users Manual Chapter Dolby Media Meter Overview Welcome to the Dolby Media Meter a software tool that measures loudness in programming This tool is ideal for program creation quality control and optimization of broadcast and disc media Dolby Media Meter runs on an Apple Macintosh or Microsoft Windows systems application and supports these plug ins e Avid Audio Extension with Pro Tools e Avid AudioSuite with Pro Tools e Virtual Studio Technology VST with Nuendo e Virtual Studio Technology VST with Sony Sound Forge Note We no longer support Apple audio units or the Real Time AudioSuite RTAS format Figure 1 1 Stand Alone Meter Measuring a Set of Source Files Dolby Media Meter User s Manual Questions or Feedback If you have questions or comments about this document contact technical publications If you have technical questions about this product or technology contact technical support Chapter 2 Installing Dolby Media Meter The process of installing Dolby Media Meter consists of these required steps Installing Dolby Media Meter on a Mac Installing Dolby Media Meter on a PC Using the PACE iLok Note If you plan to us
7. allows you to configure seven types of warning Infinite Dialogue The Target can be set from 0 to 60 Positive and negative tolerances are adjustable from 0 to 60 e Short Term Dialogue Both the minimum and maximum warning can range from 0 to 60 Infinite All The Target can be set from 0 to 60 Positive and negative tolerances are adjustable from 0 to 60 e Integrated EBU R128 The Target can be set from 0 to 60 Positive and negative tolerances are adjustable in 0 5dB increments e Loudness Range EBU R128 The maximum can be adjusted from 0 to 60 e Peak Value The maximum can be adjusted from 0 to 60 e Leq M Value The maximum can be adjusted from 72 to 96 Dolby Media Meter sets generally acceptable default values for all these warnings which you can adjust as needed Warnings are triggered when the positive or negative tolerance value or maximum has been exceeded When a warning is triggered Dolby Media Meter displays it in two ways e Measurement windows change their display color from white to red e The graph window shows a vertical line at the point in the timeline when the warning occurred This line is accompanied by a horizontal line at the bottom of the graph that extends across all the time the error was in effect and is colored matched to the warning type that occurred Dolby Media Meter User s Manual 17 Configuring the Meter 18 Dolby Media Meter User s Manual Chapter 5
8. ath the Dolby logo as shown in Figure 4 2 st Figure 4 1 Application Figure 4 2 Plug In Settings Settings Button Button The system opens the Dolby Media Meter settings window shown in Figure 4 3 Dolby Media Meter Settings Measurement Algorithm Short Term Window Peak Measurement Type Leq A ITU R85 1770 1 _ ITU RB 3 3 second 10 second Sample Peak True Peak Viewing Controls Measurements Graph Infinite e Integrated EBU R128 Input Channel Routing Infinite Dialogue L C R Ls Rs LFE t Short Term EBURI28 Dialogue Range Short Ter g Short Term EBU R128 Infinite All Dialogue Range Short Term All Peak GID Warnings Infinite Dialogue Target Tolerance Short Term Dialogue Infinite All Target e 6 d omg Target 2 Tolerance 8 ENG 5 Log File Enable Path Users jzglas Desktc Dolby Media Meter User s Manual 15 Configuring the Meter 4 1 4 2 4 3 4 4 4 5 4 6 4 7 Measurement Algorithm Choose Leq A ITU R BS 1770 1 or ITU R BS 1770 2 BS 1770 3 by clicking a radio button at the top of the settings window Short Term Window Choose a length for standards that allow this option three seconds or ten seconds Peak Measurement Type You can choose between the default peak measurement type Sample Peak and True Peak which includes peaks that occur in between samples Level Meters All of the real t
9. details about the log function 4 Click Specify Range to measure only part of the selected file Unless a range is specified here Dolby Media Meter measures the entire file If timecode is embedded in the files the meter will default to timecode If timecode is not present the meter will default to real time Highlight either or both the beginning and end fields and type new values to change them Dolby Media Meter supports all common video frame rates as well as frames seconds and samples in addition to real time measurement 5 Click Measure to start processing Dolby Media Meter displays a percentage complete tally and progress bar during processing During measurement the Measure button changes to Cancel When measuring encoded files Dolby Media Meter can display up to four different measurement types simultaneously as shown in Figure 3 4 Choose the from the nine available options by right clicking in a measurement box When measurement finishes you can read the log or view the graph For more information see Reading the Log or Viewing the Graph Additional Selectors for Dolby TrueHD and Dolby E When a Dolby TrueHD file is chosen Dolby Media Meter displays the additional selector shown in Figure 3 5 allowing you to choose which presentation Dolby Media Meter should measure The selector lists only independent and downmixed presentations Copies are not displayed as their value would be identical to the presentation of
10. ds comparable to that of the LM100 In the Dolby Media Meter AAX plug in the plug in can be inserted on the stereo output bus of Pro Tools In the AudioSuite plug in the plug in can be inserted on the two channel input file in the Pro Tools edit section for content that is already mixed and being conformed for encoding for example for DVD or Blu ray Disc In the Dolby Media Meter stand alone application the two channel Left and Right files or the two channel encoded file can be selected Measuring with Dialogue Intelligence On and Speech Absent Measuring a program with Dialogue Intelligence enabled and no detected speech results in different indications depending on which Dolby product you use The LM100 and the Dolby Media Meter AAX plug in which operate as real time meters will display the flashing ear icon until dialogue is detected If no dialogue is detected the display will continue to flash throughout the program measurement The Dolby Media Meter AudioSuite and stand alone versions which operate as non real time meters will display No Speech Detected after completion of the program measurement The DP600 or VM600 measurement can be set to revert to an overall loudness measurement as if Dialogue Intelligence was disabled Dolby Media Meter User s Manual Measuring a 5 1 Program A 4 Measuring a 5 1 Program Dolby Media Meter uses the latest advancements in measurement techniques as does the DP600 or VM600 D
11. e Dolby Media Meter with a digital audio workstation we recommend you install the workstation before you install the software 2 1 Installing Dolby Media Meter on a Mac To install Dolby Media Meter on a Mac 1 2 3 Download the software from www dolbycustomer com Read the introduction then click Continue Read the license agreement Xou mav choose to print and save it for vour records Click Continue to proceed Click Agree to accept the license agreement and proceed with installation Select a destination drive Click Continue Note The Dolby Media Meter application and documentation automatically installs into the Applications Dolbv Dolbv Media Meter folder on the Macintosh hard drive You can move it to another location after installation Plug ins install in various locations as required by your digital audio work station You should not change the location of these plug ins Note Some applications such as Sony Sound Forge might require you to navigate to the VST folder to begin using the Dolby Media Meter VST plug in VST plug ins are installed to Library Audio Plug ins VST When the system has completed the installation it automatically opens your Web browser to www dolbycustomer com This site allows you to create an account if you have not already done so With an account you receive notice of future releases and downloads of installers and documentation When you are ready close
12. e potential to be much more dynamic than the value provided by Infinite mode measurement for the same content Highly processed channels and programming will most likely not exhibit this type of behavior The benefit of measuring in Short Term mode is that the operator can see short term variations in loudness level or short term variations in dialogue level when Dialogue Intelligence is enabled within a program Many skilled audio operators prefer to use the Short Term mode measurement They find the information on near term dynamics to be 1 R128 uses the term Integrated instead of Infinite 8 Dolby Media Meter User s Manual Measuring with the Stand Alone Product very useful when mixing or producing a program and they are capable of managing overall program loudness by reading the short term measure Short Term mode is also very useful for measuring and logging the dynamic loudness history of a given program during the QC or postproduction process or in a particular television service or channel in a cable headend facility Choosing a Short Term Window Length Some standards allow a choice of short term window length either three or ten seconds Media Meter includes a setting for this choice as shown in Figure 3 3 Short Term Window _ 3 second 10 second Figure 3 3 Short Term Window Length Setting 3 2 Measuring with the Stand Alone Product The stand alone Dolby Media Meter application measures sou
13. ement value for analysis and or normalization purposes This value is also commonly used to set the dialogue normalization parameter within Dolby bitstreams Dolby Media Meter offers three measurement algorithm choices in the Settings window as shown in Figure 3 1 e Leq A e ITU RBS 1770 1 e ITU RBS 1770 2 1770 3 Measurement Algorithm Leq A ITU R 5 1770 1 ITU R BS 1770 2 1770 3 Figure 3 1 Measurement Algorithm Choices in the Settings Window EBU R128 measurements including integrated loudness short term loudness and loudness range are available when ITU 1770 2 ITU 1770 3 is selected Dialogue Intelligence can be used with either ITU R BS 1770 1 or Leq A You can measure the loudness of Dolby Digital Dolby Digital Plus Dolby TrueHD Dolby E and PCM files Choosing a Measurement Precision You can change the display to show measurements in tenths or whole numbers units To make this change right click the measurement pane shown in Figure 3 2 Then choose either units or tenths from the Display context menu The current setting is marked Dolby Media Meter User s Manual 7 Measuring Loudness Infinite Sh arm Dialogue Range Sample Peak 8 3 Dialogue 12 4 20 6 1 211 0 0 LKFS LKFS LKFS dBFS L Reset J Reset Figure 3 2 Measurement Pane Showing Tenths 3 1 Measurement Modes Short Term vs Infinite The Dolby Media Meter has two modes relating to the measurement period itself Infini
14. ights reserved S14 27180 28262 ii Dolby Media Meter User s Manual Confidential Information Table of Contents Chapter 1 Dolby Media Meter Overview Chapter 2 Installing Dolby Media Meter 2 1 Installing Dolby Media Meter on a Mac men nana enma nana 3 2 2 Installing Dolby Media Meter on a PC nn nea nana en 4 2 9 Using the PACE ILOK eiie e ata d ua a a a a ut ta E RP eg t c gi ad 4 Chapter 3 Measuring Loudness 3 1 Measurement Modes Short Term vs Infinite 8 3 1 1 Infinite Mode ei at aa a Pata a ca aa ie e i ina 8 3 1 2 Short Term Mode 2r edi ie dna a pee AA aa d d 8 3 2 Measuring with the Stand Alone Product eee aaa aaa 9 3 3 Measuring with the Plug ins eee aaa a a ee aaa a aaa 11 3 4 Measuring with the AudioSuite Plug In eene enne 12 3 5 File Naming Conventions That Ensure Automatic File Selection 13 Chapter 4 Configuring the Meter 4 1 Measurement Algorithm oerrinne aaa EE aia aaa aaa 16 4 2 Short Term Window atac e S Da ala daca ba 16 4 3 Peak Measurement Type nn eee ae ae nana ana 16 4 4 Level Mete s iare een 16 4 5 LIMITER zi ae pat coco PEE 16 4 6 Measurements Displayed 16 4 7 GTAPRI G sea ia n tents pp ot tm mon da ua 16 4 8 Warnings az ii a Baa oa ar editio 17 Chapter 5 Understanding the Log and the Graph 9 1 Reading the Loge ia naval d a
15. ile measured e Date Indicates the calendar date on which the measurement was made e Time of day Indicates the time of day the measurement was made Dialogue present Indicates the channels that contained dialogue or no dialogue The measurements you chose The warnings you chose e Peak dBFS or dBTP Indicates the largest peak value measured in the section Dolby Media Meter User s Manual 19 Understanding the Log and the Graph Peak count Indicates the number of peaks in the section that exceeded the peak count threshold value Note The measured peak value is an overall peak not related to the selection of Dialogue Intelligence The log always displays measurements with the precision of tenths of a unit 5 2 Viewing the Graph As shown in Figure 5 3 Dolby Media Meter can graph up to six measurements of the selected file Infinite Dialogue with Dialogue Intelligence on Short Term Dialogue with Dialogue Intelligence on Dialogue Range with Dialogue Intelligence on Infinite All with Dialogue Intelligence off Short Term All with Dialogue Intelligence off Sample Peak or True Peak depending on your configuration choice Integrated EBU Short term EBU Infinite Dialogue ort Term Dialogue Dialogue Range Infinite Al Short Term Al True Peak Warnings Figure 5 3 Sample Graph 20 Dolby Media Meter User s Manual Appendix A Dolby Loudness Product Comparison
16. ime plug ins allow you to show level meters similar to those in the Dolby Media Decoder for each channel being measured Limiter Dolby Media Meter allows you to apply a peak limiter which is a sample peak rather than true peak Unlike most Dolby Media Meter features this limiter acts on your tracks You can set this value from 0 to 51 to aid in preventing your tracks from exceeding the selected peak value helping you to meet delivery specifications Measurements Displayed In the stand alone application you can display any four measurements in any order In the plug ins you can display up to seven in any order Graphing Dolby Media Meter provides a flexible graphing feature to aid in visualization of the measurements it makes Right clicking in the graph window opens a contextual menu with commands to e Select the measurements to be graphed e Clear the graph display e Latch or unlatch the graph display e Print the graph display When printing the graph the printed version will be only what is currently displayed in the graph No reading outside the display will be printed Dolby Media Meter User s Manual Warnings Resizing the Graph The graph is the only part of the Dolby Media Meter display that can be resized To resize it horizontally drag the bottom right corner of the window to the right When unlatched from the plug ins the graph can be resized up to full screen 4 8 Warnings Dolby Media Meter
17. ite plug ins as prefader Measurements will not correctly match the final mixed output if the meter is inserted on the input section of Pro Tools when mix automation is present When you measure with the AAX and VST plug ins Dolby Media Meter does not add to the infinite value while the session is stopped or paused You can move along the session timeline and add to the infinite average by playing through different sections Doing so allows you to average over the entire time you work on your session In addition the log file will reference the measurement entries with an indication of both the timecode of the part of the session being measured and the time of day the measurement was taken When you measure with AAX and VST plug ins the graph displays in real time Resetting Measurements Click Reset All to restart the all measurements Click Reset Infinite to reset only the infinite measurement Reset the dialogue range and peak measurements by clicking the Reset button beneath the appropriate readout Clicking Log displays the log file Dolby Media Meter User s Manual H Measuring Loudness 3 4 Measuring with the AudioSuite Plug In The Dolby Media Meter AudioSuite plug in performs file based measurement ideal for measuring dialnorm values or overall loudness while preparing audio for packaged media formats Note When measuring multichannel input channels be sure to select the channel routing in the setting window tha
18. le set uses a period as the separator e ExampleOne L wav e ExampleOne R wav e ExampleOne C wav e ExampleOne LFE wav e ExampleOne Ls wav e ExampleOne Rs wav Example 2 This file set uses an underscore as the separator e ExampleTwo_L wav e ExampleTwo_R wav e ExampleTwo_C wav e ExampleTwo LFE wav e ExampleTwo Ls wav e ExamplelTwo Rs wav Example 3 In this file set the channel ID is not the last element in the file name The file set uses a period as the separator e ExampleThree L ENG wav e ExampleThree R ENG wav e ExampleThree C ENG wav Dolby Media Meter User s Manual 13 Measuring Loudness e ExampleThree LF ENG wav e ExampleThree LS ENG wav e ExampleThree RS ENG wav Example 4 In this file set the channel ID again is not the last element in the file name The file set uses an underscore as the separator e ExampleFour L ENG wav e ExampleFour_R_ENGwav e ExampleFour C ENG wav e ExampleFour_SW_ENG wav e ExampleFour LS ENG wav e ExampleFour RS ENG wav 14 Dolby Media Meter User s Manual Chapter 4 Configuring the Meter Dolby Media Meter offers you a wide range of choice about what and how you measure This chapter explains the choices To configure Dolby Media Meter click the settings icon which shows three sliders In the stand alone application it appears in the far bottom left corner as shown in Figure 4 1 In the plug ins it is at the left underne
19. na alan aaa 19 5 2 Viewingithe Graphis eoe tni A at gene eg ed im 20 Appendix A Dolby Loudness Product Comparison A 1 Measuring a Single Center Channel in a 5 1 21 A 2 Measuring a Stereo Program 22 Measuring with Dialogue Intelligence On and Speech 22 A A Measuring a 5 1 Programs inte a a a a o aa ala ca Da 23 Dolby Media Meter User s Manual i Confidential Information ii Dolby Media Meter User s Manual Confidential Information Figure 1 1 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 4 3 Figure 5 1 Figure 5 2 Figure 5 3 List of Figures Stand Alone Meter Measuring a Set of Source Files 1 Measurement Algorithm Choices in the Settings 7 Measurement Pane Showing Tenths eee nana enma 8 Short Term Window Length Setting 00 nenea nn nennen 9 Stand Alone Meter Measuring an Encoded File nenea nn nnnnn nnn 9 Dolby TrueHD Presentation Selector semen nea enne 10 Dolby Media Meter Plug In Window eee nenea nana en nau 11 Settings WIDdOW eee eee a AO R A A a A 15 Sample Log File Begirinllig honorc e PESE cided Ree a L
20. nal mixed output if the meter is inserted on the input section of Pro Tools when mix automation is present 1 Click Reset to restart the measurements 2 Click Log File to generate and save a log of Dolby Media Meter activity Review the default file name and location and make any necessary changes 3 Choose the desired measurement types by right clicking in a measurement box and choosing another option from the context menu 4 Click the Analyze or Render button Dolby Media Meter User s Manua File Naming Conventions That Ensure Automatic File Selection 3 5 File Naming Conventions That Ensure Automatic File Selection Dolby Media Meter automatically selects source file sets that follow these naming rules 1 2 3 4 e All the channel IDs used are standard The channel IDs are not case sensitive The channel ID is separated before and after with either a period or underscore The file names for the channels are identical except for channel ID The number of files matches the number of channels selected in the client Channels tab The file channel IDs match the channel IDs selected in the client Channels tab File names do not contain the ampersand amp character Caution File names including the ampersand amp character cannot be processed by the Dolby Media Meter The following sections provide four examples of file sets that would be automatically selected Example 1 This fi
21. olby Media Meter provides several measurement methods comparable to that of the DP600 or the VM600 e Inthe Dolby Media Meter plug in the plug in can be inserted on a multichannel output bus of Pro Tools Note Remember that Pro Tools always inserts and AudioSuite plug ins as 4 prefader Inserting the meter on the input section of Pro Tools when mix automation is present will not give a measurement that will match the final mixed output e Inthe AudioSuite plug in the plug in can be inserted on a set of multichannel input files in the Pro Tools edit section Note When measuring multichannel input channels be sure to select the channel 4 routing in the setting window that matches vour session e Inthe Dolby Media Meter stand alone application the 5 1 source channel files or a 5 1 channel encoded file can be selected Dolby Media Meter User s Manual 23
22. rce and encoded files The software analyzes the input then displays the measured results for use in determining the proper dialnorm metadata value to use during encoding This is useful for DVD and Blu ray Disc postproduction broadcast facilities video on demand VOD movie download services and video games Before you begin to measure check the default values on the Dolby Media Meter settings screen discussed in Chapter 4 EEEEE EE Figure 3 4 Stand Alone Meter Measuring an Encoded File To measure the loudness of an encoded file or a source file set 1 Click to choose either Source files or an Encoded file Dolby Media Meter User s Manual 9 Measuring Loudness 2 Identify the input file or files either by browsing the network or by typing a file name and location into the name field As in other Dolby Media Producer applications the file selector is intelligent When you double click a source file Dolby Media Meter recognizes and selects the entire set when the set follows the naming conventions described in File Naming Conventions That Ensure Automatic File Selection 3 Click Enable if you want to create a log file of this measurement Review the default log file name and location and make any required modifications By default the Dolby Media Meter names the log files input file name LoudnessEstimation csv and saves the file in the directory where the input files are stored See Reading the Log for more
23. restrictions Dolby Media Meter User s Manual 5 Installing Dolby Media Meter 6 Dolby Media Meter User s Manual Chapter 3 Measuring Loudness Differences in audio levels between programs and channels or between programs and commercials are a major annoyance to TV viewers While obvious to the viewer these loudness differences have proven difficult to measure with conventional methods and equipment For years the audio industry has quantified the level of its programming using peak program meters PPM and volume unit VU meters It is important to note that both were developed and are used to read signal voltages and therefore make no attempt to measure subjective loudness Thus several different voices adjusted in level so that they all deflect meters to the same mark may sound somewhat different in level to the listener at home This problem is often compounded by the rapid response of the meter which requires all operators to perform their own individual visual integration or averaging of the meter movement itself Dolby Media Meter features Dialogue Intelligence technology adopted from the award winning Dolby DP600 and VM600 Program Optimizer The technology automatically detects and measures loudness only during the presence of speech in an audio track Enabling Dialogue Intelligence allows the operator to simply quantify all the sections of the program that only contained dialogue and use the ending measur
24. t matches your session When measuring with the AudioSuite meter select a section of your session to measure in non real time and press either the Render or Analyze button Using the Render button to measure loudness creates a new audio file Unless you are processing the file with the limiter you may wish to manually delete it Using the Analyze button however performs the same measurement without creating a new audio file To average the measurements of different sections select a new section of your timeline and press the Render or Analyze button again That section will be averaged into the previous measurement If you do not wish to average the different sections press the Reset button before pressing the Render or Analyze button If you choose to create a log file the log file will reference the measurement entries by indicating the timecode of the part of the session being measured This function will allow you to tell which part of your session is represented by the given measurement The AudioSuite plug in can display can simultaneously display up to seven of the nine possible measurements described in Measurements Displayed Choose a measurement to display by right clicking in a measurement box and choosing from the context menu To measure faster than real time in the AudioSuite plug in Note Remember that Pro Tools always inserts AAX and AudioSuite plug ins as prefader Measurements will not correctly match the fi
25. te mode and Short Term mode The following sections describe their behavior 3 1 1 Infinite Mode Infinite mode is typically used when it is possible to measure the entire duration of the program for example all 30 seconds of a commercial or a complete two hour movie Infinite mode provides the most accurate measurement as it is able to average loudness over the complete program length This mode is most often used in ingest quality control QC and postproduction applications where audio metadata is being authored and levels can in most cases be controlled and adjusted It is also possible to use Infinite mode to measure shorter individual sections of a program rather than the entire duration This method may allow the operator to find a measurement value much more quickly In this case however the operator must ensure that the loudness levels of the sections being measured are representative of the entire program 3 1 2 Short Term Mode Short Term mode displays the measured value for the previous few seconds as a sliding window type of function Using Dialogue Intelligence for example the first measurement value is for the time between 0 and 10 seconds the next between 1 and 11 seconds next between 2 and 12 seconds and so forth Using EBU R128 the measurements are for three seconds rather than ten As the Short Term mode measures only the immediately preceding ten seconds of program material the measurement value has th
26. which they were a copy B channe Figure 3 5 Dolby TrueHD Presentation Selector Note Large Dolby TrueHD files may take a little longer to open than other file types because Dolby Media Meter must examine the entire file before beginning to measure it When a Dolby E file containing more than one program is selected Dolby Media Meter allows you to choose which program Dolby Media Meter should measure The selector lists only the programs that exist in the selected Dolby E stream Dolby Media Meter User s Manual Measuring with the Plug Ins 3 3 In both cases measurement does not proceed until you have indicated a choice Measuring with the Plug Ins As an AAX or VST plug in Dolby Media Meter measures loudness in real time letting you track levels during the mixing process to aid in meeting network delivery requirements Dolby Media Meter can simultaneously display up to seven of the nine possible measurements described in Measurements Displayed Choose a measurement to display by right clicking in a measurement box and choosing from the context menu Figure 3 6 shows a plug in example Figure 3 6 Dolby Media Meter Plug In Window Dolby Media Meter AAX or VST plug in insertion is performed on a channel by channel basis on input channels On output buses the meter may be inserted on mono stereo or multichannel buses The number of instances is not limited Note Pro Tools always inserts AAX and AudioSu
27. without the filters select ITU R BS 1770 2 to support ITU R BS 1770 3 LM100 Measuring a Single Center Channel in a 5 1 Program In postproduction the LM100 typically measures a single Center channel from a PCM source as part of a Center LFE AES pair from a 5 1 channel program selecting the Left channel in the LM100 setup menu A typical method of measuring a Dolby Digital or Dolby E stream is to select only the Center channel in the LM100 setup menu Dolby Media Meter User s Manual 21 A 2 A 3 22 Dolby Media Meter Dolby Media Meter provides several measurement methods comparable to that of the LM100 When measuring premixed content such as soundtracks being encoded for DVD or Blu ray Disc in the Dolby Media Meter AAX or AudioSuite plug in the plug in can be inserted on the Center channel in the edit section of Pro Tools When measuring new content being mixed for broadcast the AAX plug in can be inserted on the output bus In this case soloing the Center channel would most closely mimic the LM100 method In the Dolby Media Meter stand alone application the Center channel source file can be selected individually This could be an exported consolidated Center channel Measuring a Stereo Program LM100 The LM100 can be set to measure a stereo program from an AES pair Dolby E or from a Dolby Digital two channel program Dolby Media Meter Dolby Media Meter provides several measurement metho
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