Revox MK3 Network Card User Manual
Contents
1. Display Version Pure Analog Iliilll Now you are in the 5 1 Decoder Setup menu Amplifier Speaker Setup Front Large Center Large Rear Small Subwoofer Sur and Stereo O Subwoofer Pure Analog III Thu 16 15 Speaker configuration The first page in the Amplifier setup covers the configuration of home cinema speakers Here you can define which speakers you have connected and whether these are large speakers with the full frequency range or smaller speakers with limited bass reproduction There are three options for each speaker type that can be selected by repeated pressing of the corresponding softkey Amplifier Speaker Setup Center Front Large Center Large Rear Small Subwoofer Sur and Stereo D Subwoofer p Pure Analog PIII Thu 16 15 5 1 Decoder Module 3 REVOXx Re source i Large The speaker receives the full frequency range This is the right setting for speakers whose bass speaker has a diameter of at least 12cm and as a result can reproduce frequencies under 80 Hz Frequency response Large Level 80 Hz Frequency Small The speaker only receives frequencies above 80 Hz This is the right setting for smaller speakers which because of their smaller size cannot reproduce frequencies under 80 Hz As arule these are small or satellite speakers with bass cones smaller than 12cm The bass part below 80 Hz is not lost Instead it is added to th2. distributed around it The sixth speaker with a 5 1 system the subwoofer is not shown in this layout As soon as the Noise key is pressed the M51 produces a noise on the front left speaker for some 3 seconds During this time you can set up the volume of the noise using the rotary control knob Once this time has elapsed the 5 1 Decoder starts the adjusting process itself In this case the sounds are moved in a clock wise direction around the listener 5 1 Decoder Module 3 REVOXx Re source Setting the levels on passive speakers The signal from each individual speaker can be heard for about 3 seconds During this time you can set the optimum volume in a range of 10 dB using the rotary volume control or the remote control Amplifier EP Distance Noise Aunt Thu 16 08 The activated speaker is shown dark The goal The aim of this exercise is that the sound should be experienced at the same intensity from each speaker This guarantees that effects dialogue or music reaches the ear in the correct relationship This procedure continues until you press the Noise softkey again fi Subwoofer level J The basic subwoofer volume setting is not defined through the Noise menu as there are very different recording levels particularly in the case of DVDs which often require an individual adjustment This adjustment can be carried out simply and comfortably in the normal amplifier menu
3. for the audio signal The 5 1 Decoder Module handles the conversion of the symmetrical analogue signals in ultra linear stereo operation From here it also goes through gold coated silver contact relays to the output stages A further task which the 5 1 Decoder Module handles is the connection of three digital sources In this case you can either feed the digital signals in using an optical fibre or coax cable Important The 5 1 Decoder module plays a very significant role for the whole system Since it represents the Audio Control Centre the system will not operate without the decoder module 5 1 Decoder Module 3 REVOXx Re source Installation The 5 1 Decoder plug in card has the most modern technology on it and should be handled with care Before you start to install the card the M51 must be switched off and the power plug must be removed from the power socket Slot 7 is reserved for the Decoder module right next to the speaker connections No other module should be plugged in to this slot because this provides the shortest possible signal route to the outputs Loosen the two screws with the TORX screwdriver supplied and remove the slot blanking plate Before removing the Decoder module from its packaging make sure that you are not charged with any static electricity This could cause a damaging power discharge when you touch the module To be on the safe side you should dischar
4. playback DO porey surrouno DO Movie DOO Music DO Matrix Spatial X Stereo Stereo VVUVVVVY AMPLIFIER Surround Spatial The individual programmes can be selected by pressing the corresponding softkey and each programme can be set individually for each source The inner part of the display shows a graphic of up to 5 speakers including seating positions The speakers which are activated by the individual programs are shown dark the deactivated speakers are shown light 5 1 Decoder Module 3 REVOXx Re source Sound field description Dd poer SURROUND Pro Logic Il is a further development of Dolby Pro Logic and was developed especially for the surround sound playback of pure stereo sources alongside the other well known decoding of Pro Logic sound material mainly films With Pro Logic II this part handles the Music sound field with the freely definable parameters Center Width Dimension and Panorama Through this you get a realistic enveloping sound which you would expect from 1 5 1 Channel System It greatly enriches the usual stereo sound that you get from the Dolby Digital multi channel system DO Surround With this setting the 5 1 Decoder always adapts itself to the current audio format of the selected source This setting is recommended for use with Pro Logic quality television films which are being shown in your living room with the original studio mix W
5. the requirements of your living room you can choose for instance to have a partial mixture of the three front speakers or a wider or more compact sound picture Dimension This parameter allows you to position the sound field more to the back or to the front This enables you to get a better balance between the speakers with different recordings Panorama mode This mode widens the output from the front speakers In combination with the surround boxes this gives you a fascinating and enveloping effect with those sounds that are located at the edges of the sound picture 5 1 Decoder Module 3 REVOXx Re source gt DO Matrix This parameter primarily increases the surround effect for programmes sources recorded in stereo sound by using an elaborate Dolby Matrix decoder gt Spatial This is a living sound picture which was developed in the Revox sound studios It emulates a small hall where you might expect to hear some live jazz or chamber music For this reason Spatial is particularly well suited for listening to this or similar music types gt X Stereo With this stereo sound the stereo signal is also sent to the rear surround speakers but as a mirror image This means that you have stereo reproduction between each pair of speaker With a square layout this can give a fantastic feeling of space 11 gt Stereo Additionally it is possible to listen to music in pure stereo with
6. the subwoofer is only activated if a surround sound such as DU Movie DO Matrix DSP Spatial e g is selected In Pure Analog operation such as Pure Analog DSP Stereo or DO Digital Stereo the sub woofer remains silent This setting is ideal for the purist listener who likes to experience films and concerts on DVD with all six channels including the subwoofer but is happy to rely on just the main speakers for normal stereo operation such as CD or Phono This assumes of course that both main speakers can produce the required deep base tones cleanly 5 1 Decoder Module 3 REVOXx Re source Subwoofer None Amplifier Speaker Setup Center Front Large Center None Rear None Subwoofer None CF Subwoofer Pure Analog l Thu 16 05 This mode should be selected if no subwoofer is available In this case the main speakers must be capable of reproducing the deepest bass sounds This is particularly necessary in the action scenes of DVD films in order to achieve the maximum live atmosphere Quit To quit the Subwoofer menu simply press a softkey 21 Adjusting volumes Noise J The second page of the setup menu gives you the option of adjusting the volume to the listening position Amplifier Distance Pure Analog Thu 16 21 The layout in the centre of the display mirrors your listening area The seating is in the middle with the individual speakers
7. Re source 5 1 Decoder Module MK3 Dominating Entertainment Revox of Switzerland 5 1 Decoder Module 3 REVOXx Re source Contents 5 1 Decoder Module 3 Installation 4 5 1 Decoder connections 5 Line outputs 5 6 Digital inputs 6 Edit source name 7 5 1 Decoder menu 8 Room sound programs 8 Sound field description 9 Stereo Pure Analogue 11 Amplifier Sub menu 12 A Level setting 12 Adjusting the Subwoofer 13 Level resetting 13 B Bass and treble 14 C Dynamic range 14 D Lipsync Delay 15 Setup Amplifier 16 Speaker configuration 16 Large Small 17 k None 18 Speaker settings 19 Subwoofer settings 19 21 Adjusting volume 21 22 Speaker distance 23 24 Adjusting amplifier power 25 Technical data 26 Notes 27 Guarantee 27 5 1 Decoder Module 3 REVOXx Re source 5 1 Decoder Module The 5 1 Decoder module forms the core of the M51 s audio processing with all functions which the puristic Stereo and the inspired home cinema listener expects It monitors and controls all the audio signals it generates all the home cinema signals and sends them on to the outputs You can use all normal audio formats such as Dolby Surround Dolby Pro Logic Il Dolby Digital DTS or MPEG with the 5 1 Decoder Module naturally in high resolution 24 bit as well These signals are also made available to external devices through 6 cinch sockets Additionally using the Lipsync function a time delay of up to 170 ms can be defined
8. You can reach this directly through the Amplifier key on the M51 or using the remote control Please refer to the Chapter level setting on page 13 5 1 Decoder Module 3 REVOXx Re source Speaker distances ES Distance Distance selection between the listening position and the indi vidual speakers Amplifier EP Distance Pure Analog Thu 16 07 The M51 offers the option to make sure that the acoustic signal reaches you at the right time at the listening position Here the M51 needs to know the exact distance from the speaker to the listener Main speaker distance The first time you press the Distance softkey you can set the distance to the front speakers L and L using the rotary control knob These two speakers should be the same distance from the listener and you can select in the range from 2 0 to 9 9 metres 1m 40 inch 1m 3 3 feet Center distance EP Distance You can setup the centre speaker distance by pressing the Distance softkey again Here you also use the rotary control knob to set the distance In order to achieve optimum acoustic reproduction there should be a certain relationship between the front speaker distances and the centre speaker distance For this reason the M51 offers you exactly the correct range to make your selection from Example Selected distance and E 4 5m Optimum distance 3 0 4 5m If you can t position the Center speaker within
9. al1 Cinch 32 44 1 48 kHz Coaxial2 Cinch 32 44 1 48 kHz Optical TOSLink 1 75 V 100kOhm based on OdBFS OO 6 00 V 100 kOhm based on OdBFS DQ 1 75 V 100kOhm based on OdBFS DO 1 75 V 100 kOhm based on OdBFS DO YES re NI 0 006 Pure Analog 0 009 Dolby Digital DO 6 x 24 bit 92dB CCIR ARM Pure Analog 90dB CCIR ARM Dolby Digital DO 10 40 C 50 104 F DIN 40040 Product subject to modification Description ACC 3 version 1 10 26 5 1 Decoder Module 3 REVOXx Re source Notes Manufactured under license from Dolby Laboratories Dolby Pro Logic Dolby Digital and the double D Symbol are trademarks of Dolby Laboratories Manufactured under license from Digital Theatre Systems Inc US Pat No 5 451 942 and other worldwide patents issues and pending dts dts Digital Surround are trademarks of Digital Theatre Systems Inc C 1996 Digital Theatre Systems Inc All rights reserved Guarantee The guarantee period is 24 months from the date of purchase Your dealer should be your first contact if you need service If he can t give you the help you need send Decoder module carriage free and without any accessories to your national Sales Office Please supply a complete description of the problem and a full return postal address 5 1 Decoder Module MK3 Operating instructions Part no 10 30 3086 27
10. ble softkeys you can adjust the bass and treble ranges respectively If you press the Linear softkey you will restore the neutral middle range settings 14 C Dynamic range E Dyn Range With DVD playback you can modify the volume dynamic range If you select the setting Maximum the dynamics are played back in an unmodified form This means that the quietest and the loudest passages maintain the whole level range If you select the setting Standard the dynamic range is cropped This means that the volume in the loudest passages is lowered and in the quietest passages it is increased This is particularly useful if listening to DVDs later in the evening and you don t want to disturb other people in the house AMPLIFIER EF Dun Range Dynamic Range Maximum AMPLIFIER EF Dun Range Dynamic Range tandard GO Digital I 5 1 Decoder Module 3 REVOXx Re source D Lipsync Delay E Lipsunc Using the Lipsync Delay setting you can modify the timing of the audio signal to allow for the time delay of the video signal caused by the system Because of the digital calculations required for the picture signal in the plasma or LCD screen the sound signal can get ahead of the picture signal This can be seen for example when the lip move ments are no longer synchro nous to the sound Using the Lipsync function the sound can also be delayed sufficiently that the pict
11. e subwoofer or the two front speakers Small speakers benefit from the small setting by an increased load capability and a non distorted sound picture Frequency response Small Level 80 Hz Frequency 5 1 Decoder Module 3 REVOXx Re source J None The setting None deactivates the speaker output There is no signal at the output available This setting is selected if you want to work without this speaker This setting is only available for the Center and rear surround speakers Speakers with the setting None do not appear in the amplifier menu In the above example the Center is deactivated 18 5 1 Decoder Module 3 REVOXx Re source Speaker settings Main speaker E Front The settings Large Small and Digital are available here Optically the status of the speakers is shown in the display with the symbol LE or Center speaker E Center The Center can also be configured as Large Small or None With the None setting the Center signal is split between the two front speakers Optically the status of the speaker is shown in the display with the symbol LE Surround speakers E Rear The surround speakers can also be configured as Large Small or None With the None setting the surround signal is split between the two front speakers Optically the status of the speakers is shown in the display with the symbol ES or ES 19 Subwoofer E Subwoofer Using the Subwoo
12. eration the active subwoofer is principally controlled by the SUB output The level of the 6 line outputs is controlled synchronously to the total volume Active loudspeakers are speakers with integrated outputs which don t need any amplifier The line outputs are not muted during headphone operation Digital inputs The 5 1 Decoder Module can play back digital sources such as a CD MD or DAT player using the three digital inputs DIGITAL IN 1 3 You should connect the external devices to the 5 1 Decoder Module using either a Cinch cable Digital IN 1 2 input Softkey Coaxial 1 Coaxial 1 or with a fibre optic cable with a TOSLink plug Digital IN 3 input Softkey Optical Source EF Optical Coaxial1 Listening EB Coaxial2 Optical Recording Not Available More 42 BSF Unlock uuu amp Tue 13 47 The external digital sources are activated with the softkeys in the SRY menu Optical Coaxial1 Coaxial2 The externally connected digital sources are not available at the REC OUT output They also can t be used in neighbouring rooms in Multiroom operation 5 1 Decoder Module 3 REVOXx Re source Edit source name The 5 1 Decoder Module offers you the option to select your own name for the inputs In this way you no longer have to remember which external device you have connected to which input You can label it accordingly Select the digital source in the SOURCE menu
13. fer menu you can setup the operation of an active subwoofer in the whole speaker concept Amplifier EB Front Speaker Setup ha Front Large Center None Rear None CP Rear Subwoofer Sur and Stereo Ee Subwoofer Pure Analog I Amplifier Thu 16 05 Speaker Setup Conter Front Large Center None Rear None Subwoofer Surround only l Thu 16 05 Amplifier Speaker Setup Center Front Large Center None Rear None Subwoofer None I Thu 16 05 By repeatedly pressing the Subwoofer key you will reach the menus shown where you can make the appropriate settings for your use 5 1 Decoder Module 3 REVOXx Re source Subwoofer Sur and Stereo Amplifier Speaker Setup Center Front Large Center None Rear None Subwoofer Sur and Stereo CF Subwoofer Menu ded Pure Analog Thu 16 05 This mode is recommended if the active subwoofer should work with multi channel reproduction DSP Spatial Dolby Pro Logic e g and in Pure Stereo operation Such a setting is particularly beneficial if the other speakers can produce bass tones but only within a limited range Main compact or shelf mounted speakers with limited bass reproduction belong to this category Subwoofer Surround only Amplifier Speaker Setup Center Front Large Center None Rear None Subwoofer Surround only CF Subwoofer Menu di4 Pure Analog Thu 16 05 In this mode
14. ge any static from yourself by touching an earthed metal object such as a radiator Remove the decoder module from its packaging and insert it into the slot position using the two tracks within the M51 to guide it into position The lettering on the card must be at the top Just before the card is fully inserted you will feel a certain mechanical resistance as the card meets the M51 contact strip Push the card fully home by pushing in the area where the 2 screw holes are located and fix it in place with the two screws All further steps needed to integrate the new module into the M51 will be carried out automatically next time the unit is switched on 5 1 Decoder Module 3 REVOX Re source 5 1 Decoder connections Line outputs The 5 1 Decoder offers 6 line outputs where audio signals are available in 5 1 format The following is an overview of the individual signals OUTPUT L Line output for the left hand front channel OUTPUT R Line output for the right hand front channel SUB Line output for the active subwoofer CENTER Line output for the centre channel nou SURROUND L Line output for the rear left 5 1 Decoder 1 551 084 02 hand surround channel SURROUND R Line output for the rear right hand surround channel 5 1 Decoder Module 3 REVOXx Re source These line outputs are used to supply external outputs In the same way active speakers can be connected In Home cinema op
15. hen you play a DVD whether using the M51 s internal drive or an external device over DIGITAL IN the 5 1 audio format that the DVD requires is automatically selected These are Dolby Digital DTS MPEG In this case all other surround sound programmes are blocked DO Movie The Movie mode has been optimised for use with films or programmes with a sound track in Dolby Surround It is also suitable for video games Movie mode has all the important properties of Pro Logic while the Stereo Surround outputs which cover the whole frequency range give you a sound experience that much more closely resembles the quality of Dolby Digital 5 1 Decoder Module 3 REVOXx Re source DO Music With pure stereo music recordings the Music mode delivers a new level of live atmosphere which satisfies the most discerning listener You can set up every conceivable combination of settings using the Center Width Dimension and Panorama parameters The choice of parameters is made through the second Menu i page of Music AMPLIFIER Center Width 7 ES Dimension Dimension 1 ath Nal Panorama On D Panorama DOFL Ii Music III 10 Center Width This parameter allows you to define the centre settings allowing you to choose to hear the centre range just from the Center speaker to hear it as a phantom centre using the right and lefthand speakers or to set up a combination of all three speakers Depending on
16. ic switch on Many active subwoofers have a function that automatically switches the subwoofer on as soon as there is a bass signal with a particular level If your subwoofer doesn t switch on automatically at normal room volume levels because the bass signal is too low you could increase the level on the subwoofer output through the amplifier menu until the auto switch on function is activated After this of course the volume at the subwoofer must be adjusted again 13 Resetting the level ER Reset Level settings can be reset to the neutral mid position with the Reset key AMPLIFIER Center Not Used Surround Pn ETIT Ee Surround Surround 3 Ee Subwoofer Subwoofer 3 Subwoofer bn E DOFLI Music Speakers like the Center in the above example which are deactivated in the basic settings are identified by the text Not Used The basic volume setting for all speakers is set through the Adjusting volume menu 5 1 Decoder Module 3 REVOXx Re source B Bass and treble EF Bass Treble J As well as the sound field settings you also have the option of increasing or decreasing the bass and treble levels in the range of 12dB This option is only available with the sound fields Stereo X Stereo and Spatial You can access the bass treble menu by pressing the Menu softkey twice AMPLIFIER Treble t poronnn 1 Spatial Now with the Bass and the Tre
17. ou can adjust the output power level The three screenshots below show you three of the six power steps that can be selected Amplifier EP Volume Volume 31 Maximum Yolume Full 100 Amplifier EP Volume Volume 31 Maximum volume 30B 71 Amplifier Volume Maximum Volume 6dB 50 Thu 16 09 The power adjustment can be used for the analogue and the digital outputs and is applied equally over all five channels The following table shows you the relative volume reductions and the remaining power Full 100 1dB 90 2dB_ 80 3dB 71 4dB 63 5dB_ 56 6dB_ 50 Example Analogue output Reduction 2 dB Power 80 of 60W 48W Example Digital output Reduction 2 dB Power 80 of 200W 160W Volume display The reduction in volume is visible in the display field if you select a volume that is higher than the reduction the volume bars flash in the corresponding area as shown in grey in the following graphic 5 1 Decoder Module 3 REVOXx Re source Technical data Formats Dolby Prologic II Dolby Digital AC3 dts MPEG 1 Layer 2 MPEG 2 with without extension MP3 Inputs Digitalln1 SPDIFF Digital In 2 SPDIFF Digital In 3 SPDIFF Analogue outputs Front L R Sub Min Center Rear L R Harmonic distortion D A conversion Low noise spacing Operating conditions Errors excepted 32 44 1 48 kHz Coaxi
18. out the influence of any room sound program In the lower display field this is indicated with EEE In this case the audio cables are connected directly to the outputs on an ultra linear amplifier path AMPLIFIER Surround Stereo Pure Analog If however you want to modify the treble and bass settings in stereo mode this will take you out of the ultra linear path Playback is then done through a DSP as shown by the display field at the bottom of the screen AMPLIFIER All surround speakers are deactivated in this function and are therefore shown as light symbols on the display 5 1 Decoder Module 3 REVOXx Re source Amplifier sub menu The sound fields have different sub menus where you can define your specific sound requirements Not each sub menu is available for all sound fields Center Center Center Not Used A E Surround Surround J Surround m 1 E Subwoofer Subwoofer J Subwoofer E Reset e nettn Menu QOPLI Music Bass Bass Bass ensue freer or B E Treble Treble J Treble a Stereo o Range C Dunemic Range laximum a Menu a OO Digital l m Delay Delay D ad Lpsing Delay ms a ESP Unlock Monan 1 amp Tue 13 36 wath Center Width wth a E E Dimension Dimension J Dimension Panorama D Panorama m Menu a GOPLI Music You can get to the Amplifier sub menu by pressing the menu sof
19. this distance range you will just have to select a distance which most closely approximates to it 5 1 Decoder Module 3 REVOXx Surround speaker distance As opposed to the main speakers the rear surround speakers can be set at different distances from the listener By pressing the Distance softkey one more time you can set up first the right and then the left rear surround speaker Also here you use the rotary control knob to set the distance In the same way as with the centre speaker the M51 only allows a certain distance range in relation to the main speakers Example Selected distance and El 4 5m Optimum distance ES and ES 0 0 4 5 m If you can t position the surround speakers within this distance range just choose the nearest alternative distance available to you Quit Distance Simply press one of the other softkeys in the Setup menu if you want to quit the Distance menu field If you don t want to make any more settings through the Setup menu press either the or AO keys Re source 5 1 Decoder Module 3 REVOXx Re source Adjusting amplifier power The M51 can be equipped with two outputs with different power levels either an analogue output 5 x 60 watt or the more powerful digital alternative 5 x 200 watt If you want to connect speakers to the digital output which are not set up for this power level there is a menu point in the Setup menu where y
20. tkey or by repeated pressing of the Amplifier key E Description P 9 OO Music A Level setting The sub menu shown below suggests level settings for the surround speakers including Center and Subwoofer AMPLIFIER Center Not Used Ee Surround Surround 3 Surround e Ee Subwoofer Subwoofer 3 Subwoofer bomn bofonn 1 DEFUI Music The speakers can be adjusted to the correct volume ratio to the main speakers using the 1 amp softkeys This function allows you to make a temporary adjustment to the Center and Surround volumes The settings are automatically reset as soon as another source is selected or the M51 is switched off The setting for the Subwoofer on the other hand is saved until the next modification of the subwoofer level or until a complete reset using the Reset key 5 1 Decoder Module 3 REVOXx Re source A Adjusting the Subwoofer Unlike the normal passive speakers that are connected to the M51 speaker outputs active subwoofers have their own volume control To set the correct basic volume you should first bring the subwoofer level to the neutral mid position with the Reset key Then you should adjust the volume at the subwoofer itself to suit your listening position The right basic volume setting for the subwoofer is achieved when the subwoofer doesn t dominate the sound picture but nevertheless gives a sustained support to the bass tone ranges Tip Automat
21. ure and the sound get back in sync This time delay can be set in a range from 0 170 ms Amplifier Lipsunc Delay 170ms SP Unlock Puii amp Tue 13 36 The Lipsync function appears as the last menu field within the Amplifier menu and affects all sources that the M51 can play The Lipsync function is not available in the Pure Analog sound field 15 You can adjust the time delay in steps of 5 ms using the two softkeys Delay To do this you are advised to select a DVD which features drums or other percussion instruments This is the easiest way to be able to synchronise picture and sound with each other Lipsync in Multiroom system In Multiroom operation the M51 and the rooms in Zone 1 share a common audio source i e both play the same source This is particularly advantageous in open living areas where the rooms in Zone 1 adjoin the main room with the M51 If the M51 audio signal ex periences a delay through the 5 1 Decoder module the M51 will transmit its sound later than that in the rooms of Zone 1 This time delay will be per ceived as an echo in the adjoining rooms 5 1 Decoder Module 3 REVOXx Re source Amplifier Setup Using the Setup menu you can adapt your loudspeakers to the optimum acoustics with the M51 This menu is called by pressing and holding the SAM key for some 2 seconds and then pressing the Amplifier key in the display that follows ES Amplifier
22. whose name you want to change You call this function by pressing the EMY button for approx 2 seconds and then pressing the Source softkey The following display appears EDIT NAME OF Delete O ptical_ Insert Store 4 Unlock pimi Tue 14 20 Edit function You will move to the following menu display by pressing the Edit Name softkey EDIT NAME O ptical_ Insert Unlock Mimi l Tue 14 20 The following Edit functions are available The softkey lt Cursor moves the cursor to the left The softkey Cursor gt moves the cursor to the right The softkey Delete deletes the cursor at the current cursor position The softkey Insert inserts a character to the left of the cursor The softkey Store saves the currently displayed name and returns you to the source menu The softkey Cancel returns you to the source menu without saving any modifications made 5 1 Decoder Module 3 REVOXx Re source 5 1 Decoder menu As the 5 1 Decoder module is the central unit for the processing of audio signals this module has been assigned its own function key namely the large key labelled as MAN on the front of the M51 The five large buttons on the front of the M51 are shown as in the following chapters Room sound programs The MA button brings you directly into the 5 1 Decoder Main Menu Here you can choose between 6 Surround sounds and an ultra lineal stereo
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