At Tue, 30 Jun 2009 22:51:03 +0200, Stephane BERTHELOT wrote: > > Takashi Iwai a écrit : > > At Tue, 30 Jun 2009 15:04:05 +0200, > Stéphane BERTHELOT wrote: > > Hi Takashi, > > Thanks for you answer. > I have the exact same problem and configuration than reported here > https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4406 > apart : > - I'm using a ION platform (Acer Revo R3600 but still MCP7A : 0x10de0007) > - I never get the Dolby Digital or DTS indicator illuminated on my Amp. > - My TV is a Sharp LC-52X20E > > I thought this was a known problem and than someone at Nvidia could > provide the missing HDA Verbs, if you prefer I can post to the > alsa-devel mailing list to investigate further. > I can get a alsa-info output tonight, though it's very very similar to > the one in the bug report. (and Raymond was saying that we should get > "PCM AC3" on digital outputs) > > Try ac3dec for a primary testing instead of mplayer. It's included in > alsa-tools. > > % ac3dec -C -H foo.ac3 > > Use the latest one so that it accespt -H option. > > Takashi > > Thank you Takashi for taking time to review my problem. I cc'ed alsa-devel > since I have more info now and maybe some other people have the same problem > or already a workaround. > > I'm attaching the output of alsa-info.sh with my mixer settings and after > having run ac3dec -H -C file.ac3 > > It works with -R instead of -C but does not work with -C or with -P (consumer > or pro) > I also tried modifying settings using iecset (audio off / audio on and > consumer/pro) and no combination seems to work. > > When I play stereo LPCM my TV set plays sound and so does my Amp in PCM mode. > When I try to play in AC3 mode (-C) my TV set says "incompatible format > received" and both the TV and Amp stay silent. Hm, so apparently your TV doesn't accept non-audio format? But TV accepted the ac3dec output with -R option, right? (Make sure this -- otherwise ac3dec might have decoded by itself.) Basically, -R means to send the encoded an AC3 stream (packed in the SPDIF format) without setting non-audio bit. Whether non-audio bit is 1 or 0 is the only difference between -C and -R. So, if -R really works but not -C, it means that the non-audio bit must be off no matter what you send. Weird. > I may try again on XP/Vista tomorrow to be really sure it works on them. > > When changing play mode AES0 changes from 0x00 to 0x02 and AES1 to AES3 stay > the same (0x82,0x00,0x02 if I remember well) Note that the setup you made before ac3dec will be overridden anyway. And during ac3dec playback, the status bits are locked and can't be changed by others. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
