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

Scott & Nicole Harris snharris99 at live.com
Mon Mar 5 01:14:23 UTC 2012

>I've got a bit of an issue with audio that might be more operating
>related than mythtv related but since audio works in mythtv, I thought
>ask it here.

>I just got mythbuntu working well using a GeForce GT 430. Video and
>are both coming through the HDMI cable out of the 430 when using
>mythtvfrontend. When I open a browser (currently using Chromium, though
>don't think that matters), I get no audio.

>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
>set of sliders for PCM which I have all the way up. In the mixer
>tab, I see 4 things: "IEC958" "IEC958 2" "IEC958 3" and "IEC958 4"
>are all checked.

>In case it helps, I'm running mythtvfrontend --version shows this:

>MythTV Version : v0.24.1-80-g1de0431
>MythTV Branch : fixes/0.24
>Network Protocol : 63
>Library API : 0.24.20110505-1
>QT Version : 4.7.3
>Options compiled in:
> linux profile using_alsa using_oss using_pulse using_pulseoutput
>using_backend using_bindings_perl using_bindings_python using_dvb
>using_firewire using_frontend using_hdhomerun using_hdpvr using_iptv
>using_ivtv using_joystick_menu using_lirc using_mheg using_opengl_video
>using_opengl_vsync using_qtdbus using_qtwebkit using_v4l using_x11
>using_xrandr using_xv using_bindings_perl using_bindings_python
>using_mythtranscode using_opengl using_vdpau using_ffmpeg_threads
>using_live using_mheg

>And the operating system is Ubuntu 11.10 as installed from mythbuntu.

>Can somebody give me some pointers on what I should be looking
>with to get audio out of "everyday" ubuntu apps?

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"

where hdmi:0,3 the hdmi card 0 device 3.  In your case it will likely be 
hdmi:0,9 (the car may not be 0, confirm with aplay -l). 

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