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cat /proc/asound/devices

aplay -l
aplay -L

(that's little ell and cap ell)

will show you what alsa is looking at HW wise.  I found a myth alsa article, or checklist, or something that was kinda useful.

My first problem was my kernel didnt recogonize the audio hdmi out.  but a kernel upgrade fixed that.  (well, the newer alsa in the newer kernel fixed it).

Then I had to find the right /etc/asound.conf settings, which was googling and trial and error.  In the end I have:

$cat /etc/asound.conf

pcm.!default {
        type plug
        slave.pcm "hdmi"
}



In myth, I have the audio device set to: "alsa:hdmi"




as an example (this is not my mythbox):
$ aplay -L
default:CARD=NVidia
    HDA NVidia, VT1708S Analog
    Default Audio Device
front:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    Front speakers
surround40:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
null
    Discard all samples (playback) or generate zero samples (capture)

see anything like that?

-Andy