[mythtv-users] HDMI audio: plughw:0, 7 works but hdmi:CARD=NVidia doesn't

[Jean-Yves Avenard]

Hi

On 20 February 2011 13:05, Dave Badia <dbadia at gmail.com> wrote:
> figured might as well try.  Anyway, the DTS-HD soundtrack fails to
> play, here's the part of the frontend log with -vaudio:
> (Full log from the start of playing the video at http://pastebin.com/hXepZgsX )

You can output the logs; so surely you've read them and see what error
you could at least fix:
> 2011-02-19 20:44:48.883 ALSA, Error: Setting hardware audio buffer size to 640
> 2011-02-19 20:44:48.884 ALSA, Error: Error opening
> /proc/asound/card0/pcm7p/sub0/prealloc: Permission denied.
> 2011-02-19 20:44:48.884 ALSA, Error: Try to manually increase audio
> buffer with: echo 640 | sudo tee
> /proc/asound/card0/pcm7p/sub0/prealloc

So amazingly enough, you need to do:
echo 640 | sudo tee /proc/asound/card0/pcm7p/sub0/prealloc

to get started