Per Toft wrote: >> S/PDIF supports either two PCM (uncompressed) channels or passthrough of >> lossily encoded multichannel (up to 8 channels can be used then afaik). >> >> speaker-test, as you tried to run it, is generating 6 PCM (uncompressed) >> streams, and as S/PDIF can only carry 2 PCM channels then you only near >> two of them out of your speakers. >> >> "Dolby Digital" and DTS are both lossy (some audio quality is lost to >> save filesize/bandwith) formats which Windows, and probably ALSA, can >> pass directly over the digital link to be decoded by your speakers' >> decoder. >> >> The things which *should* work for multichannel are: >> * Enabling digital passthrough and sending undecoded AC3/DTS straight to >> your reciever >> * Using 3 (analogue) stereo cables to connect your PC to your speakers, >> you'll then need to use the surroundXX family of devices. Probably >> surround51 >> >> -ol >> >> > > Hi again, > > When i use AC3 pass-through to the SPDIF from mplayer i get no signal... > Will try to investigate further. Can't really help you with that, never used ALSA+S/PDIF personally. > Have also tried using the three analogue and speakertest: > speaker-test -Dplug:surround51 -c6 > Sound in front left and right. No other. Only things I'd suggest would be to pass '-t wav' to speaker-test to make sure it's not downmixing it for some reason (if it is then you'll get 'back left/right, centre etc.' through the front sides). Also make sure your reciever is expecting 6 channels, on mine there's a switch to choose between it treating the jacks as one 6 channel device and three stereo devices. Beyond that..I'd look for someone with the same motherboard, when I had similar issues on my (snd-hda-intel) board then it turned out to be a driver issue. Wait for someone with the same board -ol
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