Cambridge DacMagic
Contents
1. o azur DacMagic Upsampling digital to analog converter User s manual 2 ENGLISH 6 Cambridge Audio Contents Indios 3 Important safety instructions 4 Rear pono tonno loris rs Los oa croco e E pteetto re DV tont even erede ve kde lae bbs veda schechovd sendcescaneutewsesaastoctusaiebed 8 Front panel controls Audio output CONMECHIONS e 12 Digital audio input CONNECUONS saaa boca betreuen deu tea PD redd ord revues 13 PG2USBCONMECT ONS ee 14 Digital audio output connections lees sesseeisese sensn etate tnt nntteth stas tn a tns this sra sns eannan 16 OperatitgitiSt tloliS 4 aseo caves AE et ccc rn hess ds deceit eet sce Een Decet eoa ore NI SARN yc ED Ee eae EINER 17 Ic T He 18 TechnicaliSpecificatiOns cocaina eee prebere treten carere ais 25 WMOUBIESHOOUING fate tian EcL a dasadaadalcvectciddaweve vas 26 limited werra irinin ERANO AEA aoa Ee E Sea Ud een Pa Ed sev Ree 27 This package should contain the following 1 x Azur DacMagic assembled 1 x AC 12V 1 5A power adaptor 4 x rubber feet 1 x rubber base 1 x USB B A type lead 1 x user s manual For further information about Cambridge Audio our products news reviews and support please visit www cambridge audio com azur DacMagic Introduction Thank you for purchasing this DacMagic Upsampling Digital to Analog Conve2. Coaxial Optical Mu PSU Sn X This device complies with part 15 of the FCC Ru o mno Unbalanced Audio Outputs Single ended conventional stereo outputs for connection to the line level phono RCA inputs of an amplifier Balanced Audio Outputs The DacMagic also features true balanced XLR outputs This is a higher quality output that can reject noise and interference with equipment with balanced inputs These balanced outputs are ideally suited for connection to the Cambridge Audio 840A or 840E amplifiers XLR connectors should be wired as follows Pin 1 Ground Pin 2 Hot in phase Pin 3 Cold phase inverted Digital Outputs The digital outputs allow a digital recording device to be connected These outputs loop or pass through unprocessed digital audio from the selected digital input Two types are available both the co axial and the optical are active concurrently and can be used to connect and run equipment at the same time S P DIF co axial to obtain best results use a high quality 75 ohm digital RCA interconnect cable not one designed for normal audio use azur DacMagic TOSLINK optical use a high quality TOSLINK fibre optic interconnect cable designed specifically for audio use To achieve the best results we always recommend using high quality Cambridge Audio leads which are guaranteed for life Note These outputs are pass through only there is no upsampling or any other modification don
3. company Overloading Do not overload wall outlets or extension cords as this can result in a risk of fire or electric shock Overloaded AC outlets extension cords frayed power cords damaged or cracked wire insulation and broken plugs are dangerous They may result in a shock or fire hazard Be sure to insert each power cord securely To prevent hum and noise do not bundle the interconnect leads with the power cord or speaker leads Cleaning To clean the unit wipe its case with a dry lint free cloth Do not use any cleaning fluids containing alcohol ammonia or abrasives Do not spray an aerosol at or near the unit Servicing These units are not user serviceable Never attempt to repair disassemble or reconstruct the unit if there seems to be a problem A serious electric shock could result if this precautionary measure is ignored In the event of a problem or failure please contact your dealer ENGLISH Cambridge Audio Rear panel connections la Caution www cambridge ayzzx com i Sariai Numi inai Q LO da mmn Digital Outputs Digital Input 1 Digital Input 2 Designed in the UK Made in Cina ce Cambridge Audio _PseMasie Upsampling DAC l USBin 12V 1500mA l dI Unbalanced S P DIF Toslink S P DIF Toslink S P DIF Toslink Use supplied Output Right Balanced Output Left Coaxial Optical Coaxial Optical
4. 20kHz Output impedance Output level unbalanced Output level balanced Digital input word widths supported Digital input sampling frequencies supported Audio output upsampling Dimensions H x W x D Weight Steep filter disabled 16bit for USB azur DacMagic Dual Wolfson WM8740 24bit DACs Texas Instruments TMS 320VC5501 DSP upsampling to 24bit 192kHz 2 Pole Dual Differential Bessel Double Virtual Earth Balanced 20Hz to 20kHz 0 1dB lt 0 001 24bit 0 00196 0 00296 112dBr 130pS 100dB lt 90dB 50ohms 2 1V rms 4 2V rms 2 1V per phase 16 24bit 32kHz 44 1kHz 48kHz 88 2kHz 96kHz Fixed 24bit 192kHz 52 x 215 x 191mm 2 0 x 8 6 x 7 6 1 2kg 2 6lbs ENGLISH 25 Cambridge Audio Troubleshooting There is no power Ensure the supplied AC adaptor is connected securely to the PSU socket on the rear panel Ensure that the correct mains transformer is being used and that it complies with the local electrical supply Ensure the mains plug is fully inserted into the wall socket and is switched on There is no sound Ensure that the amplifier is set correctly Check that the interconnects are inserted correctly Check that the correct digital input is selected Incoming Sample Rate LED should be on A low hum or buzzing sound can be heard Power cords or lighting placed near this product Analogue inputs are not securely connected Visit www cambridge audio com and
5. RIDGE AUDIO SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY IN THIS PRODUCT EXCEPT TO THE EXTENT PROHIBITED BY LAW THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSOEVER INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PRACTICAL PURPOSE Some countries and US states do not allow the exclusion or limitation of incidental or consequential damages or implied warranties so the above exclusions may not apply to you This Warranty gives you specific legal rights and you may have other statutory rights which vary from state to state or country to country For any service in or out of warranty please contact your dealer 27 ENGLISH Cambridge Audio is a brand of Audio Partnership Plc Registered Office Gallery Court Hankey Place London SE1 4BB United Kingdom Registered in England No 2953313 t a i m fo o e a a lt 2008 Cambridge Audio Ltd
6. al impulse the output has both a small amount of pre and post spike amplitude ringing albeit well damped Impulse response Amplitude A Vy 0 20 40 60 80 100 120 140 160 180 Time samples 19 Cambridge Audio Minimum Phase Filter Magnitude dB 20 20 100 120 140 160 180 200 Frequency response 0 1 0 2 0 3 04 0 5 0 6 0 7 0 8 0 9 1 frequency FS input sampling rate azur DacMagic The Minimum Phase filter is another highly regarded audio filter that offers even lower ripple in the pass and stop bands Unlike the Linear Phase filter group delay is not constant so some time coherence is lost however phase shift is low and the particular benefit with this filter is that the impulse response exhibits no pre ringing ENGLISH Impulse response Amplitude P Minna VV UV o 20 40 60 80 100 120 140 160 180 Time samples 21 6 Cambridge Audio Steep Filter Magnitude dB 22 20 100 120 140 160 180 200 Frequency response x Steep filter Linear phase filter 0 1 0 2 0 3 0 4 0 5 0 6 0 7 frequency FS input sampling rate 0 8 0 9 1 azur Da
7. and EMC requirements Ross Test Stamp This product meets Russian electronic safety approvals ENGLISH Cambridge Audio FCC regulations NOTE THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT SUCH MODIFICATIONS COULD VOID THE USER AUTHORITY TO OPERATE THE EQUIPMENT This equipment has been tested and found to comply with the limits for a Class B digital FC device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Recorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Ventilation IMPORTANT The un
8. cMagic Our Steep filter is a linear phase filter that has been optimised for stop band attenuation of close in aliasing images Here we have traded a little attenuation of the very highest frequency response 2dB at 20kHz and a little more pre and post ringing for a very steep attenuation just outside the pass band The Steep filter is able to attenuate aliasing at 22kHz by some 80dB ENGLISH Impulse response Amplitude 0 20 40 60 80 100 120 140 160 180 Time samples Note All filters exhibit the same ultimate roll off of approximately 140dB 23 6 Cambridge Audio The following table shows the filter stop band attenuation Linear Phase Minimum Phase Steep Roll off at 20kHz 0 1dB 0 1dB 2dB Roll off at 22kHz 10dB 10dB 82dB Ultimate roll off 140dB 140dB 140dB We encourage you to experiment with the filters to determine which sound best to your ears and using your source equipment programme material The DacMagic remembers and recalls the selected filter type for each input individually making it possible for example to select Steep for the USB input and Linear Phase for Digital Input 1 and so on 24 Technical specifications D A converters Digital filter Analogue filter Frequency response THD 1kHz OdBFs THD 1kHz 10dBFs THD 20kHz OdBFs S N ratio Total correlated jitter Crosstalk 9 1kHz Crosstalk
9. e device manager may change However the DacMagic will always appear as a USB Audio Device in the Sound Video and Game Controllers window Note It is also possible to disable the DacMagic in the device manager by right clicking on the highlighted USB Audio device and then clicking Disable from the sub menu window 15 ENGLISH Cambridge Audio Digital audio output connections Note Do not turn on the unit until all connections have been made DacMagic Balanced Output R L Digital Outputs Digital Inputs Digital Inputs 2 LJO OO a USB In Unbalanced AC adaptor lt _ OR gt Digital recorder D eI Digital Inputs LLL LLL If it is desired to loop out the currently selected digital audio for recording on a suitable device MD CD R etc you can connect either an S P DIF co axial or TOSLINK optical cable to the digital outputs as shown each type being of equal quality Both output types are active concurrently and both can be used simultaneously to run equipment Note There is no upsampling performed on the digital output pass through 16 azur Operating instructions DacMagic The DacMagic can be sited in two different positions as shown in the accompanying diagram It can be placed horizontally by fitting the four small individual feet or v
10. e to the LPCM input signal Digital Inputs 1 and 2 The DacMagic is fitted with two sets of digital inputs which enable the connection of source components Each input has both S P DIF and TOSLINK types fitted Only one of the two types for each input should be connected at any one time If both the optical and co axial outputs have connections made to them even if only one is attempting to function neither will work S P DIF co axial to obtain best results use a high quality 75 ohm digital RCA interconnect cable not one designed for normal audio use TOSLINK optical use a high quality TOSLINK fibre optic interconnect cable designed specifically for audio use Note This unit only accepts two channel LPCM digital audio e g Dolby Digital 2 0 You cannot connect a Dolby Digital 5 1 or a DTS signal as they will not be recognised If you wish to connect a DVD or similar device please ensure that the sound output of your player is set to two channel PCM USB In USB Type B input allowing direct connection to a PC via a Type B to Type A USB lead The DacMagic s operation is independent of your PC soundcard it will operate whether your PC has a soundcard or not AC 12V 1 5A Power Adaptor Socket Once you have completed all connections plug the supplied power adaptor into the DacMagic Important Note Use the supplied power supply unit ONLY ENGLISH Cambridge Audio Front panel controls la 6 Camb
11. ertically by using the large rubber foot Power on the DacMagic using the On Off button on the front panel After 4 5 seconds the unit will ENGLISH unmute and the current Source and Filter type will be shown by the front panel LEDs Using the Source button on the front panel select the appropriate digital input i e USB lt Digital 1 or Digital 2 that you wish to listen to Switch on the external source input e g CD player DVD player etc The sampling frequency of the Digital Input will be displayed on the front panel e g for a CD player 44 1kHz Momentarily press the Filter Phase selector button to cycle between three different filter modes Start playback of the source equipment The DacMagic will output analogue audio from the Unbalanced Balanced outputs upsampled to 192kHz 24bit A raw S P DIF co axial and TOSLINK optical digital output is also provided These outputs can be used to connect a compatible digital recorder e g CD R MD etc The DacMagic is compatible with Digital Stereo LPCM of a sampling frequency between 32 96kHz Note Being a stereo device this unit does not decode 5 1 Dolby Digital or DTS Bitstreams from a DVD player etc When receiving a multi channel digital input the analogue audio outputs are muted However a 5 1 DD or DTS Bitstream will pass through to the digital outputs Cambridge Audio L I Horizontal placement oipny a8puquuio Qe Vertica
12. gic Balanced Output o0 o0 R fo L a c Digital Outputs Digital Inputs Digital Inputs Ef V2 S27 0c LIC OO dal Q up Unbalanced USB In J E V V ji AC adaptor OR Amplifier I Unbalanced Input pore L i s L Largo R Balanced Input LL Use either the unbalanced RCA Phono or balanced XLR outputs of the DacMagic The XLR output is slightly better in quality as it can reject interference and noise in the cable connection and is the preferred option if your amplifier features balanced XLR inputs It is possible to use the RCA phono connections and the XLR balanced connections at the same time e g for connecting to different amplifiers or multi room operations 12 azur DacMagic Digital audio input connections Note Do not turn on the unit until all connections have been made DacMagic Balanced Output R L Digital Inputs 9n fe USB In Digital Outputs Digital Inputs Unbalanced AC adaptor CD DVD player O Digital Outputs Connect your digital source to Digital Input 1 Either S P DIF co axial or TOSLINK optical types can be used each being of equal qua
13. ic to be connected to a PC and act as a very high quality DAC Soundcard offering genuine HiFi quality playback from your desktop media PC etc A digital output is fitted which passes through the selected digital source for recording purposes no up sampling performed Your DacMagic can only be as good as the system it is connected to Please do not compromise on your amplifier speakers or cabling Naturally we particularly recommend amplification from the Cambridge Audio range Your dealer can also supply excellent quality Cambridge Audio interconnects to ensure your system realises its full potential Thank you for taking the time to read this manual we recommend you keep it for future reference fae br Matthew Bramble Cambridge Audio Technical Director and the DacMagic design team ENGLISH Cambridge Audio Important safety instructions For your own safety please read the following important safety instructions carefully before attempting to connect this unit to the mains power supply They will also enable you to get the best performance from and prolong the life of the unit zm 10 31 T2 13 14 9 4goggB50N Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with a dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sou
14. it will become warm when in use Do not stack multiple units on top of each other Do not place in an enclosed area such as a bookcase or in a cabinet without sufficient ventilation Positioning Choose the installation location carefully Avoid placing it in direct sunlight or close to a source of heat No naked flame sources such as lighted candles should be placed on the unit Also avoid locations subject to vibration and excessive dust cold or moisture The unit can be used in a moderate climate azur DacMagic This unit must be installed on a sturdy level surface Do not place in a sealed area such as a bookcase or in a cabinet Any space open at the back such as a dedicated equipment rack is fine however Do not place the unit on an unstable surface or shelf The unit may fall causing serious injury to a child or adult as well as serious damage to the product Do not place other equipment on top of the unit Due to stray magnetic fields turntables or CRT TVs should not be located nearby due to possible interference Electronic audio components have a running in period of around a week if used several hours per day This will allow the new components to settle down and the sonic properties will improve over this time Power sources The unit should be operated only from the type of power source indicated on the marking label If you are not sure of the type of power supply to your home consult your product dealer or local power
15. l placement 17 Cambridge Audio Filters The DacMagic DSP has three different Filter functions Linear Phase Minimum Phase and Steep All three filters are highly sophisticated audiophile topologies optimised specifically for audio playback In our opinion these filters offer excellent sound quality but differ subtly in optimisation hence we ve made all three available to you Note For clarity all diagrams show the theoretical response of the DSP itself excluding any analog filtering at the DAC output or the anti aliasing filter applied during recording and or mastering of the digital source Linear Phase Filter Frequency response 20 20 40 ao B o 80 oO 23 5 100 s 120 140 YR EEEE 180 200 o 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 frequency FS input sampling rate 18 azur DacMagic The Linear Phase filter is a highly regarded audio filter offering low ripple in both the pass and stop bands and what is known as constant group delay Constant group delay means that audio signals of all frequencies are always delayed by the same amount when passing through the filter All audio is therefore fully time coherent at the output ENGLISH The trade off with this type of filter is that due to internal feed forward in the DSP its impulse response will exhibit some pre ringing In other words when excited with a theoretic
16. lity Important Note Only connect one co axial OR optical cable to each digital input The unit will not operate if both connections are made even if only one is active 13 ENGLISH Cambridge Audio PC USB connections Note Do not turn on the unit until all connections have been made PC DacMagic Balanced Output 9969 Unbalanced Output Digital Inputs Digital Outputs Digital Inputs USB In AC adaptor USB B A type lead GEN EC m EXE a 14 azur DacMagic Connect a USB B A type lead as illustrated at left from the DacMagic s USB input to one of the USB ports on the PC This is the normal type of USB lead with an oblong plug at one end and a square plug at the other Switch on the DacMagic using the front panel On Off switch and make sure that the USB input is selected USB LED lit The Windows Found New Hardware dialogue bubble should now appear at the bottom right hand side of the Windows desktop The description of the DacMagic will be displayed as USB audio device Installation should be automatic and no driver disc is required After a few seconds the message Your new hardware is installed and ready to use should appear to confirm that installation has been successful Important Note The PC s previous audio o
17. rces such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Use with only the cart stand tripod bracket or table specified by the manufacturer or Sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as the power supply adaptor having been damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped azur DacMagic WARNING To reduce the risk of fire or electric shock do not expose this unit to rain or moi
18. register to receive notification of future hardware and software releases This guide is designed to make installing and using this product as easy as possible Information in this document has been carefully checked for accuracy at the time of printing however Cambridge Audio s policy is one of continuous improvement therefore design and specifications are subject to change without prior notice If you notice any errors please feel free to email us at support cambridgeaudio com This document contains proprietary information protected by copyright All rights are reserved No part of this manual may be reproduced by any mechanical electronic or other means in any form without prior written permission of the manufacturer All trademarks and registered trademarks are the property of their respective owners Copyright Cambridge Audio Ltd 2008 26 azur DacMagic Limited warranty Cambridge Audio warrants this product to be free from defects in materials and workmanship subject to the terms set forth below Cambridge Audio will repair or replace at Cambridge Audio s option this product or any defective parts in this product Warranty periods may vary from country to country If in doubt consult your dealer and ensure that you retain proof of purchase To obtain warranty service please contact the Cambridge Audio authorised dealer from which you purchased this product If your dealer is not equipped to perform the repair of your Cambridge A
19. ridge Audio On Off amp o Source Lingo Filter Phase Phase Incoming Sample Rate F N g 32 441 48 882 96 Y Gi Digital o o o o o Yy Sais Ne Digtal2 0 Steep o Min g o DacMagic Z5 UpsampingbAc RUF D Power On Off Switches the unit between On and Off Source Press to select between USB playback or Digital Inputs 1 and 2 The corresponding LED will light up to show which source has been selected Filter Phase Select Momentarily press to select between three different filter modes linear phase minimum phase or steep see page 18 for details The corresponding LED will light up to show which filter has been selected 10 azur DacMagic Phase Indicates the output phase selected Press and hold the Filter Phase select button for approximately two seconds to select normal or inverted phase output When the LED lights up the phase is inverted by the DacMagic If you suspect that your source material or amplifier etc is inverting the phase of the musical signal you can use this function to re invert the audio and regain absolute positive phase ENGLISH Incoming Sample Rate In the presence of an incoming digital stream the relevant LED will light up to indicate the incoming digital sampling frequency between 32kHz and 96kHz LPCM 11 Cambridge Audio Audio output connections Note Do not turn on the unit until all connections have been made DacMa
20. rter We are confident that you will enjoy many years of listening pleasure from it The DacMagic features ATF Adaptive Time Filtering an up sampling process developed in conjunction with Anagram Technologies of Switzerland to intelligently interpolate incoming audio data of between 16 24 bits 32 96kHz to 24bit 192kHz through the use of a 32bit Texas Instruments DSP Digital Signal Processor The ATF system applies sophisticated polynomial curve fitting interpolation to create the extra data points and incorporates a time domain model which adaptively generates the new data in the temporal domain dramatically reducing digital jitter even that present in the input audio As with our high end CD players our proprietary Dual Differential Virtual Earth Balanced filter topology is used configured as a low order two pole linear phase Bessel filter to take advantage of the high sampling rate achieved Two very high quality Wolfson WM8740 24bit DAC ICs are used in dual differential mode Since each channel has its own DAC to process information completely separate and symmetrical analog filter circuitry can be implemented These allow both left and right channel circuitry to operate identically ensuring the DacMagic delivers fantastic sound staging and stereo imaging properties Two digital inputs are fitted both featuring S P DIF and TOSLINK and allow a wide range of digital Sources to be connected In addition a USB input enables the DacMag
21. sture The unit must be installed in a manner that makes disconnection of the mains plug from the mains Socket outlet or appliance connector from the rear of the unit possible Where the mains plug is used as the disconnect device the disconnect device shall remain readily operable Only use the power supply adaptor supplied with this unit Please ensure there is ample ventilation at least 5cm clearance all round This unit must not be used near water or exposed to dripping or splashing water or other liquids No objects filled with liquid such as vases shall be placed on the unit for electrical and electronic equipment This product contains electrical and electronic equipment which should be reused recycled or recovered and should not be disposed of with unsorted regular waste Please return the unit or contact the authorised dealer from whom you purchased this product for more information WEEE symbol The crossed out wheeled bin is the European Union symbol for indicating separate collection C CE mark This product complies with European Low Voltage 2006 95 EC and Electromagnetic Compatibility 89 336 EEC Directives when used and installed according to this instruction manual For continued compliance only Cambridge Audio accessories should be used with this product and servicing must be referred to qualified service personnel C Tick mark This product meets the Australian Communications Authority s Radio communications
22. udio product it can be returned by your dealer to Cambridge Audio or an authorised Cambridge Audio service agent You will need to ship this product in either its original packaging or packaging affording an equal degree of protection Proof of purchase in the form of a bill of sale or receipted invoice which is evidence that this product is within the warranty period must be presented to obtain warranty service This Warranty is invalid if a the factory applied serial number has been altered or removed from this product or b this product was not purchased from a Cambridge Audio authorised dealer You may call Cambridge Audio or your local country Cambridge Audio distributor to confirm that you have an unaltered serial number and or you made a purchase from a Cambridge Audio authorised dealer This Warranty does not cover cosmetic damage or damage due to acts of God accident misuse abuse negligence commercial use or modification of or to any part of the product This Warranty does not cover damage due to improper operation maintenance or installation or attempted repair by anyone other than Cambridge Audio or a Cambridge Audio dealer or authorised service agent which is authorised to do Cambridge Audio warranty work Any unauthorised repairs will void this Warranty This Warranty does not cover products sold AS IS or WITH ALL FAULTS REPAIRS OR REPLACEMENTS AS PROVIDED UNDER THIS WARRANTY ARE THE EXCLUSIVE REMEDY OF THE CONSUMER CAMB
23. utput device should now be temporarily disabled and the DacMagic becomes the default audio playback device for the PC This can be confirmed in the Control Panel s Sounds Speech and Audio Devices properties window under the Volume tab The DacMagic is described as a C Media USB Headphone Set as we use a C Media USB interface IC running a headphone i e two channel profile If you wish to disconnect your DacMagic and return to using your previous soundcard etc simply disconnect it or switch off the power on the front panel If the PC fails to disable the DacMagic and automatically re enable your default soundcard you can manually disable the DacMagic in the hardware device manager To do this navigate to the Device Manager click Start Control Panel Vista Performance and Maintenance System Hardware Device Manager in Windows XP Scroll down the device manager window and expand the heading Sound Video and Game Controllers to display a list of the connected devices The DacMagic will be listed as USB Audio Device Click on this description to highlight in blue and then click on the Disable icon Gil at the top of the window A warning message will appear Disabling this device will cause itto stop functioning Do you really want to disable it Click Yes to disable the DacMagic The previous audio playback device will now be re instated by Windows Note As Windows operating systems evolve the path sequence to th
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