Quoting Takashi Iwai <[EMAIL PROTECTED]>: > > > hmm.. ICH4 has a separate SPDIF channel and it looks like we don't use > > > this properly. that is, SPDIF is routed via the normal slot 3/4. > > > perhaps we should route the spdif via slot 10/11 (in GLOB_CNT bit > > > 30:31 to 1:1), and set SPSA to the corresponding value. > > > the definition of iec958 in ICH.conf should be rewritten, too... > > The default configuration for ad1980 is to use slots 7/8. 3/4 is not > > the best choice since the DACs are set to this by default. I don't > > think ICH4 has anything to do with this, I downloaded the specs a while > > ago only to realize that it just gives you access to the ac97 regs and > > that's it. > > no, as mentioned above, ICH4 has the configuration of SPDIF out slots > via GLOB_CNT bits 30:31. please check these bits.
You're absoultely right (of course). I didn't get that far in the ICH4 docs, I thought the ac97 chapter covers it all :-). > > > There's practically nothing to configure on the south bridge itself. > > > > > > > > anyway, can you check whether the register 0x3a is set correctly when > > > mplayer tries to play ac3? > > > > > Yes and no :-). I dumped all ac97 regs from /proc and was going to send > > you teh list, but they did not change at all between PCM and ac3. I later > > discovered, quite by accident, that for some reason ac3 is never routed > > to the ac97 codec - when I choose the hwac3 option the stream always > > goes to emu10k1 (and plays correctly over its spdif), even though I > > explicitly specify "hw:1". I have to try unloading the modules for emu and > > > see what happens then. But this seems anyway a bug. Unless the ICH driver > > declares no possibilty to create open ac3 stream and alsa falls back on > > the default card? > > can you try ac3dec in alsa-tools (with -C option). > if it works, then it's a bug of mplayer. mplayer should access > "spdif" or "iec958" as the pcm name. Worked like a charm! No problem, on any of the two cards. So I guess I have to start patching mplayer now ;-) (which I was gonna do eventually anyway, since it doesn't handle dts streams correctly). Thanks a lot for all your help guys! You've greatly help me enjoy my audio experience on Linux. Fycio. -------------- Fycio (J.Sobierski) [EMAIL PROTECTED] ------------------------------------------------------- This SF.net email is sponsored by: SlickEdit Inc. Develop an edge. The most comprehensive and flexible code editor you can use. Code faster. C/C++, C#, Java, HTML, XML, many more. FREE 30-Day Trial. www.slickedit.com/sourceforge _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
