Page 2 of 2 FirstFirst 12
Results 11 to 14 of 14

Thread: HDMI Audio

  1. #11
    Join Date
    Oct 2007
    Location
    Toronto-ish
    Posts
    7,575

    Default

    Quote Originally Posted by crazycheese View Post
    So there is issue and all three cases are not possible? Or how can I understand this?
    Sorry, what are the three cases ?

    What I'm saying is that there are two more or less completely unrelated hardware blocks. There's usually an audio controller in the chipset along with the audio controller in the GPU. The one in the chipset is connected only to regular jacks on the motherboard; the one in the GPU is connected only to the HDMI output block and GPU hardware combines the video and audio info into a single stream.

    The issue AFAIK is that the audio driver either doesn't support or isn't enabling multichannel output. No graphics knowledge is required to work on the audio driver. You do need some GPU knowledge to work on the combiner block in the GPU - Alex has already said that the GPU info we released recently should be enough to enable *combining* multichannel audio with video on the HDMI output if the audio controller is *generating* a multichannel audio bitstream - but Rafel and others already have that knowledge.

  2. #12
    Join Date
    Apr 2010
    Posts
    1,946

    Default

    Quote Originally Posted by bridgman View Post
    Sorry, what are the three cases ?
    http://phoronix.com/forums/showthrea...219#post257219

    Quote Originally Posted by bridgman View Post
    What I'm saying is that there are two more or less completely unrelated hardware blocks. There's usually an audio controller in the chipset along with the audio controller in the GPU. The one in the chipset is connected only to regular jacks on the motherboard; the one in the GPU is connected only to the HDMI output block and GPU hardware combines the video and audio info into a single stream.

    The issue AFAIK is that the audio driver either doesn't support or isn't enabling multichannel output. No graphics knowledge is required to work on the audio driver. You do need some GPU knowledge to work on the combiner block in the GPU - Alex has already said that the GPU info we released recently should be enough to enable *combining* multichannel audio with video on the HDMI output if the audio controller is *generating* a multichannel audio bitstream - but Rafel and others already have that knowledge.
    This is fair, but I am not a programmer, I hope you are not surprised. I can spare 10 for this feature if you setup "properly HDMI multichannel audio output" on kickstarter. I think its fair. Thanks!

  3. #13
    Join Date
    Oct 2012
    Location
    Bavaria, Germany
    Posts
    1

    Default

    Has there been any progress on the multichannel HDMI issue during the last months? I recently got a nice little Zotac AD11 with E450 and would love to be able to send LPCM streams over HDMI.

    From what I understand, all required knowledge is avaliable, but the audio driver needs to be updated, so basically the folks at ALSA would have to implement this knowledge?

    Thanks,
    Alex

  4. #14
    Join Date
    Sep 2007
    Posts
    1,002

    Default

    I was wondering about the current state, too. I'm helping to build a HTPC for a Linux user so I'm wondering whether to recommend Nvidia or ATI.

    It is just to play video/audio via HDMI. Not worried about hardware acceleration or anything like that.

    I read that AMD/ATI cards are not universally supporting HDMI with the radeon driver. Big surprise. Aside from the fact, the Radeon Feature webpage was down and there's mixed reports about the FOSS driver supporting HDMI, what is the update?

    I looked at a HD 6450 since it's about $20 but I think you have to be using kernel 3.3? Does HDMI work with the Noueveau drivers? Or is it better to use the blob regardless of which side you go with?

    AMD/ATI still doesn't support Linux and the articles here show more developers signing off. So, I've been proven right, yet again. So, why is anyone still recommending the company? They are investing even less into Linux, not more.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •