I know this subject has been hashed to death. I have spent the last 5 hours doing searches trying to figure out how to fix it.
I was using an old SoundBlaster Live! card, and everything worked fine. I just exchanged that card for a M-AUDIO Delta 410. Configure ALSA to drive it, and tested with aplay and mplayer. Everything worked beautifully.
Then I tried Myth. Myth seems to "open" the sound card just fine. It even seems to write to it just fine:
This probably isn't much help, but I'm seeing the same thing on an EPIA M10K box. mplayer (with option "-ac hwdts,hwac3,a52,") can do ac3 from a myth-recorded .nuv, but when myth tries it the receiver detects a change from PCM 48KHz to DD 2.0, a quick burst of static, and then silence. Switching to MP2 audio at least gets me sound.
I'm using ALSA:spdif, and just tried the suggested hw and plughw options (eg ALSA:hw:0,16 and ALSA:hw:0,17). These opened OK, but no sound at all.
$ cat /proc/asound/devices 0: [0- 0]: ctl 17: [0- 1]: digital audio playback 25: [0- 1]: digital audio capture 16: [0- 0]: digital audio playback 24: [0- 0]: digital audio capture 33: : timer
Matthew.
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