How to decode AC3/DTS bitstream from spdif-in

Discussion in 'PC Hardware, Software and Displays' started by JaylumX, Feb 1, 2009.

  1. JaylumX

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    I have an Asus Xonar d2X which i would like to use to decode audio coming from my PS3 and 360 which currently shares one toslink input of my receiver using a toslink switcher. Sound quality is good but i know my Xonar has better DACS (or better wot-nots).

    So far I have connected the toslink to the Spdif input of my Xonar so that my Xonar decodes the sound and forwards them to my analogue speakers. When i enable spdif-in in recording device there is sound. Also when i use graphedit to link; capture device (Spdif in)/Directshow filter (Ac3filter or Ffdshow Filter)/Output Device (Xonar Speakers) - and activate the link, it plays PCM audio but when it comes to decoding AC3 or DTS bitstreams all i get is noise.

    Theoretically shouldn't the AC3filter decode the AC3/DTS bitsream or is there more to it than i am aware. Also i have noticed with graphedit that when linking Capture Device (Spdif in) to Directshow filter (AC3 Filter) the PCM option of supported formats in AC3 filter must be enabled or else i get an error message. I have tried linking the Spdif in with other AC3 directshow filters - Cyberlink, WinDVD (which don't have a PCM option in each respective configuration), FFdshow and the only succesful one was ffdshow and only after i enabled "all supported" under uncompressed in the codecs option but it still does not decode AC3/DTS bitsreams.

    Anyway, i just wanted to know if there is another way for my PC to decode AC3 and DTS bitsreams from my Spdif input (with out me having to buy a creative soundcard). To sum up, I basically want to use my PC as a home cinema receiver.

    Cheers
     
    #1 JaylumX, Feb 1, 2009
    Last edited by a moderator: Feb 1, 2009
  2. djskribbles

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    So you want to connect your PS3 and 360 (which is on a single input via a toslink splitter) to your soundcard, then you want it to decode the audio and play it to your analog PC speakers? Or do you have home theater speakers?

    edit: According to these links, the Xonar D2 doesn't support DTS/DD via the spdif input, only the output. It only supports stereo PCM via the spdif input.
    http://forums.overclockers.co.uk/showthread.php?p=12881509
    http://vip.asus.com/forum/view.aspx...M&id=20080202223539578&page=1&SLanguage=en-us
    http://vip.asus.com/forum/view.aspx...M&id=20080701052137656&page=1&SLanguage=en-us
     
    #2 djskribbles, Feb 2, 2009
    Last edited by a moderator: Feb 2, 2009
  3. dadudster

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    I have created a new thread on the AVS Forum to compile all of my knowledge about SPDIF related issues.
    http://www.avsforum.com/avs-vb/showthread.php?p=15846010#post15846010

    It provides a really detailed compiling of everything I have discovered about this issue, and lists the limitations in detail.

    Lets move all further discussion related to this issue to that thread.

    Also, please circulate the thread. I would like it to become a sticky in that forum subsection (so that people wont waste the hours I have wasted on this issue).
     
  4. JaylumX

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    Cheers for your work fella.
     
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