[mythtv-users] No HDMI audio

[Phill Wiggin]

>
> Could one of you flesh this out so that I can make an addition to the wiki?
>  I don't really understand what is needed here.  Also, give me the relevant
> model numbers.
>
> Allen
>

Allen,

  Thanks for the great wiki article. I used it to set up my zotac board. My
specific modifications are at:
http://www.zoomthingie.com/wordpress/?p=161

Nothing exciting, really. Just had to make a couple of small changes.

I didn't take notes about the BIOS, but the BIOS has options for onboard
sound. Internal, External, Both (and maybe Neither/Disabled?). HDMI sound
requires _at least_ Internal, but I had to enable "Both".  It sounds like
spdif/analog require at least External.  If I had to guess, I'd imagine
"Internal" refers to the Nvidia HDA sound built onto the NV chipset, and
maybe "External" refers to a chip that's on the motherboard, but "external"
to the NV chipset. That's purely supposition though.

When I enabled "Internal" only, my aplay -L looked something like:

# aplay -L
hdmi:CARD=NVidia,DEV=0
   HDA NVidia, NVIDIA HDMI
   HDMI Audio Output
null
   Discard all samples (playback) or generate zero samples (capture)

But, I couldn't get any sound out of it.  I had to enable "Both" and my
aplay -L looked like Marc's.

e.g.
# aplay -L
front:CARD=NVidia,DEV=0
   HDA NVidia, HDA Generic
   Front speakers
surround40:CARD=NVidia,DEV=0
   HDA NVidia, HDA Generic
   4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
   HDA NVidia, HDA Generic
   4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
   HDA NVidia, HDA Generic
   5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
   HDA NVidia, HDA Generic
   5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
   HDA NVidia, HDA Generic
   7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=NVidia,DEV=0
   HDA NVidia, NVIDIA HDMI
   HDMI Audio Output
null
   Discard all samples (playback) or generate zero samples (capture)


I'm not at home atm, so I can't be more specific. If you have specific
questions, I'm happy to give any info I've got.

--Phill
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