I've been able to get sound (2 channel PCM) by simply using system- config-soundcard to use the IEC958 device as default. Works great! When encountering AC3, it downmixes to two channels.
However I can't get AC3 or DTS to passthrough no matter what I try. As a simple base case, I tried using mplayer to play a DVD
mplayer -vo xv -ao alsa:device=hw=0.0 -ac hwdts,hwac3, dvd://1 I hear a pop and then nothing. aplay -l looks like this: **** List of PLAYBACK Hardware Devices **** card 0: IXP [ATI IXP], device 0: ATI IXP AC97 [ATI IXP AC97] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: IXP [ATI IXP], device 1: ATI IXP IEC958 [ATI IXP IEC958 (AC97)] Subdevices: 1/1 Subdevice #0: subdevice #0 and cat /proc/asound/devices 2: : timer 3: : sequencer 4: [ 0- 1]: digital audio playback 5: [ 0- 0]: digital audio playback 6: [ 0- 0]: digital audio capture 7: [ 0] : controlSo I tried both 0.0 and 0.1. With 0.1, mplayer basically halts (maybe 1 frame per minute.. didn't really have the patience to wait). With 0.0 and no -ac component, I get the movie in 2 channel audio.
Any ideas? (BTW, I've tried this with a Turtle Beach Audio Advantage Micro (about the same results) and a Chaintech AV-710 (no sound except from system-config-soundcard))
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