[mythtv-users] audio question: GeForce GT 430 over HDMI

[Jean-Yves Avenard]

Hi

On 5 March 2012 12:00,  <ojw at weilerfamily.com> wrote:
> In the audio section of mythfrontend setup, the audio device used is
> "ALSA:dmix:card:NVidia,DEV=9". When I open the mixer gui, I see a
> single
> set of sliders for PCM which I have all the way up. In the mixer
> "switches"
> tab, I see 4 things: "IEC958" "IEC958 2" "IEC958 3" and "IEC958 4"
> which
> are all checked.

What you configure for mythtv and what your default audio device will
be for the whole machine are two different things.

First, if you use ALSA:dmix:card, you are giving up on a lot of audio: features

basically, stereo only and no digital passthrough

On 5 March 2012 12:14, Scott & Nicole Harris <snharris99 at live.com> wrote:
> I suspect it's your default sound card in Ubuntu is set to another sound
> device (i.e. onboard sound).  I had to a an .asoundrc to my home folder with
> one line in it....
>
> pcm.!default "hdmi:0,3"


you definitely don't want to use this as your default audio device, as
only one application at the time can play audio.
As soon as one app open the audio device, it becomes unavailable to
all the other applications attempting to use it.

Instead, you should something like this in your ~/.asoundrc (or
/etc/asound.conf to make it system-wide)

pcm.!default {
   type plug
   slave.pcm "dmix:0,3"
}

where 0 here is the card number, and 3 is the device number

a dmix is non-blocking, and will let all applications play audio simultaneously.