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Thread: Please explain digital sound options, cause some things are not working

  1. #11
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    Re: Please explain digital sound options, cause some things are not working

    I will try this later.
    The Linux sound system is tampering with the stream? and not allowing it to pass through unmodified.
    http://globatic.blogspot.com/2013/07...-surround.html

    The standard way of getting this stack to work is to pass through the digital audio signal as-is from the source media to the amplifier. This means that the system cannot mix in other sounds, like system notifications, to the audio output stream without scrambling the original proprietary DTS/AC3 digital encoding of the audio stream. In short, you need an exclusive access to the audio stream for the application you are using. Normal Linux sound system mixers, such as Pulse and GStreamer are poison, I haven't been able to get digital surround sound working with these, and I am not convinced that there is a way. However, you don't need to uninstall your convenient sound system stack, just make sure that your video player application skips the stack and goes directly to the sound card, for example by using ALSA.

  2. #12
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    Re: Please explain digital sound options, cause some things are not working

    Well that did not work at all with mplayer as it could not open the sound device. So no sound.

    I found so far that only VLC can play dolby digital sound AC3.
    Only so far on file extensions of ac3 or avi.

    Working example video and audio DD 5.1 surround perfect in VLC.
    http://www.tfm.ro/win32-projects/test-avi-ac3/
    http://www.lynnemusic.com/surround.html

    Can anyone give me more info on what to do about the m2ts DD 5.1 files and vlc?

    The m2ts files show the same audio codec as the avi files.
    Sometimes the m2ts files play like R2D2 squeaky sounds, sometimes silent.
    In windows7, with VLC they play DD 5.1 sound fine.

  3. #13
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    Dec 2006
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    Re: Please explain digital sound options, cause some things are not working

    well, next step is to follow mythtv instructions for DD playback
    http://www.mythtv.org/wiki/Digital_Audio_Tutorial

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