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MDAC first listen (part IV)

Discussion in 'audio' started by adamlau, Feb 5, 2012.

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  1. GaryT

    GaryT pfm Member

    Sorry if this has been answered elsewhere on this (epic) thread, but the forum search tools have been no use in finding out.
    I have just connected my MDAC via USB to my PC laptop running WIN7, using WASAPI (ASIO was a real PITA and I gave up). I have downloaded a version of the bitperfect test via google, as the Audiolab site didn't seem to have it available. I have a couple of questions:
    1 - is there more than 1 version of the testfiles available, and if so, where can I get the latest?
    2 - my player (using Foobar) passed the 16/44 test, but failed the 24/96 after 2 seconds. I saw something on my searches through the thread about a bug WRT the 24/96 test. Is this correct, and if so, how can it be rectified?
    Thanks for lasting to the end of my questions, and I will be grateful for any help received.
  2. LukeW

    LukeW New Member


    Just purchased fidelia music player for mac to use with the M-DAC, I just tried the bit perfect and fails everytime anyone had any look getting it to pass?

    Also during playback the M-DAC display swaps between 16/24 bit for a slit second every couple of seconds.

    The sound does have a notable improvement over iTunes / bitperfect but I have also lost the remote function via the M-DAC but can live with that for improvement .

    Does it mean a failed bit perfect test means the sound quality is compromised ?

    Any help would be welcome.

    Thank you

  3. sq225917

    sq225917 Bit of this, bit of that

    Luke, you don't need any software player for the Mac just use iTunes, unless you have to use Flac. There's bugger all difference between any of them into the Mdac.
  4. MI55ION

    MI55ION pfm Member

    Hi Plutox,

    Sorry just saw your response, been off with the flu last few days.

    Asio resampling is unchecked/off.

    Status bar on foobar says: PCM | 1411 kbps | 44100 Hz | stereo

    When i hover over the small green ASIO symbol on the bottom right corner of screen it says : 2048 samples @ 44100 Hz

    The CDQ screen says 24bit/48.0k

    It doesnt matter what i change the output to via foobar, display reads same as above on CDQ screen.

    Would appreciate it if John, yourself or anyone in the know could help.

  5. LukeW

    LukeW New Member

    Try it you will hear a diffrence.
  6. fusion5

    fusion5 on the dark side of hifi...

    Maybe that's the problem. When playing bitperfect they should all sound the same.
  7. highfi

    highfi pfm Member

    Getting new belden cables between m-dac and atc 100 active. Power amp xlr configuration is 1 ground 2 negative 3 positive. Power amps in ATC speakers have a 47 Ohm resistor between pin 1 of their XLR inputs and ground. Any tips regarding correct cable configuration? For instance should the cable shield be connected on the m-dac side only or both sides or not at all? Should ground be connected? Anything else i should know? Many thanks!
  8. JohnW

    JohnW pfm member

    Connect Ground on both ebds (Pin 1), but you can try the shield connected or unconnected at the Speaker end - what ever sounds (works) best.

  9. JohnW

    JohnW pfm member

    What OS are you using - have your tried WMP?

  10. MI55ION

    MI55ION pfm Member

    Windows xp service pack 3

    Not tried any other programmes, really do prefer foobar though as im quite familiar with it now.

    Edit: if by WMP you mean windows media player then yes i tried just to see and it still reads sane as above
  11. Oktane

    Oktane Active Member

    I reserved M-DAC from my local dealer but I already know I end up needing some additional attenuation...

    Will the standard £289 M-PAX version allow to use the -12/-24/-36 dB attenuation feature or are the premium extras required?
  12. JohnW

    JohnW pfm member

    Yes the M-PAX unit itself is the same for both versions - so you have -12/-24/-36 dB attenuation feature in both versions.

    You can update the MDAC internal PSU at any time,

  13. JohnW

    JohnW pfm member

    What other applications are you running on your PC - Windows XP should replay file at there default setting unless another program requests a higher sampling rate - such a Skype...

    There must be an earlier installed device or application that is forcing Windows to up-sample.

  14. adamlau

    adamlau Um...What Is Going On?

  15. Thanks John. Will look out for the Beta update. Fingers crossed it fixes this. BTW - yes,the frequency display does jump around a bit when the Sonos is selected
  16. MI55ION

    MI55ION pfm Member

    Thanks for your input John.

    After much faffing around and uninstalling a whole bunch of programmes i was still getting 24/48. In a final attempt I uninstalled Foobar/asio (latest versions) and re-installed them but using the previous asio driver it started to work perfectly. In hindsight the problem might have been the latest version of asio because it was working fine before but at some stage after updating the driver and without me realising, it went wrong.

    Thanks again
  17. tio4711

    tio4711 Member

  18. realysm42

    realysm42 reMember

    Hi John,

    I've had my M-dac for about a month now and all I can say is thank you!

    My music has never sounded so involving and enjoyable!

    I know the pre-orders are well, pre-ordered, but could you put me down on the list for the second round, for the uprated M-pax (and any other udgrade lists, if they exist for this unit)?.

    Cheers mate!

    Also, it would be really helpful if there was a website will all of the main faq's for the unit listed, even if there's no official answer to the question, I've done a lot of reading (As a lurker) on this forum and so many questions get repeated it's unreal - might make your life easier ;)
  19. Jo Sharp

    Jo Sharp Pulls on doors marked push

    We could put a thread in the Trade announcements section if John wanted to.
  20. flatpopely

    flatpopely Prog Rock/Moderator

    Used an M Dac today at Scalford, just need one with an ADC and I'll buy it, really very impressed!
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