[alsa-devel] ALSA patch Nvidia 8 channel hdmi audio

[Marek Vasut]

I'm not the author of the patch, CCing alsa-devel and the original author.

On Tuesday 02 of June 2009 23:58:26 Alan Alan wrote:
> Hi Marek !
>
> I just read your emailing with nvidia devs about alsa supporting 8 channel
> lpcm over hdmi.
>
> I checked it out an i have to tell it is working awsome, except for a few
> bugs:
>
> The channels are wrong mapped. Running a speakertest -Dhdmi -c6 gives the
> following result (first where it should sound)
> FL - FL
> C - RL
> FR - FR
> RR - LFE
> RL - C
>
> The other thing i realized that playback is limited to 16 bits 48 khz. I
> think the minimum which is supported by nvidia hardware is 24bits 96 (or
> 192) khz.
> Why not ?
>
> Could you contact the devs as i don't know how to reach them.
>
> ps.: Mybe my build methot was not 100% ok ? I used 1.020 Alsa with the
> oatched nvidia.c file. Anyway the amplifier shows multichannel LPCM and
> that's great news.