I am having trouble with HDMI audio - I initially ran the AVWizard, had no audio despite selecting HDMI, pretty much expected this since I'd read about needing to upgrade nvidia drivers and alsa. I have upgraded nvidia drivers to 185.18.29 and alsa to 1.0.20, then I re-tried the AVWizard, still no sound. Went to a command line and did some testing with aplay can't get any sound, although to me everything looks OK using the tests/troubleshooting steps I've found here and on other forums regarding getting this working.
My motherboard has onboard NVidia, with HDMI out and can do audio over HDMI (audio over hdmi works fine with the same setup under WinXP, so the hardware is definitely working).
I am trying aplay -Dplughw:0,3 /usr/share/sounds/foo.bar which returns "Playing raw data foo.bar : unsigned 8 bit, rate 8000 Hz, Mono
It looks like it should be playing but nothing is heard from the speakers on the TV.
alsamixer shows various channels - master, pcm, front and center are all unmuted and set to high settings, IEC958, IEC958 D and IEC958 1 are present, they are not muted, their volumes are set to 00 and are not adjustable - I presume this is normal since they are digital outputs?
aplay -l shows:
Card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
Subdevice #0: subdevice #0
Surely that's the correct device, and when I aplay to hw:0,3 it should just feed the digital audio straight to that output, but doesn't seem to work.