A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1651> ====================================================================== Reported By: tycordinal Assigned To: jcdutton ====================================================================== Project: ALSA - driver Issue ID: 1651 Category: PCI - emu10k1 Reproducibility: always Severity: minor Priority: normal Status: assigned Distribution: Kernel Version: 2.4.31 ====================================================================== Date Submitted: 12-14-2005 09:44 CET Last Modified: 07-23-2006 18:44 CEST ====================================================================== Summary: ac3 passthrough not really work with ac3dec Description: using the following from alsa-tools to play ac3 as passthrough: ac3dec -C oneac3file.ac3 the ac3dec is able to "open" the spdif device "iec958:{AES...}" and did not report any error and keep on running, but the ac3 decoder (creative ddts-100), connected to the "spdif output" from the card, did not switch to dolby mode, and no sound come out from speaker. one interesting thing is, when I run this: ac3dec -6 oneac3file.ac3 As this is software decoding to PCM, I can hear the left/right channels from the front stereo jacket, as they also output on the "spdif output". Therefore, I believe the "spdif output" on the card is indeed working, just that for this card we might need to write some different AES command to open the spdif output? I am not sure if the alsa config files in /usr/share/alsa have to change or maybe some "switches" in emu10k1_main.c needs to apply for the "spdif output" to really behave as "iec958" device to passthough ac3 stream to external decoder. Thanks. ====================================================================== ---------------------------------------------------------------------- pzad - 12-14-05 10:53 ---------------------------------------------------------------------- IEC958 Optical Raw - this is just multiplexer switch. If there is MM - this means spdif output comes from DSP and from normal playback device. If there is OO - spdif output comes from iec958 (or spdif) device. Please do, what I suggest you in previous note. Your problem is "Audigy Analog/Digital Output Jack" control. ---------------------------------------------------------------------- jcdutton - 07-23-06 18:44 ---------------------------------------------------------------------- Which sound card are you using? cat /proc/asound/cards cat /proc/asound/version Issue History Date Modified Username Field Change ====================================================================== 12-14-05 09:44 tycordinal New Issue 12-14-05 09:44 tycordinal Kernel Version => 2.4.31 12-14-05 10:05 tycordinal Note Added: 0007031 12-14-05 10:15 tycordinal Note Added: 0007032 12-14-05 10:16 tycordinal Note Added: 0007033 12-14-05 10:30 pzad Note Added: 0007034 12-14-05 10:31 tycordinal Note Added: 0007035 12-14-05 10:53 pzad Note Added: 0007036 07-18-06 14:43 jcdutton Status new => assigned 07-18-06 14:43 jcdutton Assigned To => jcdutton 07-23-06 18:44 jcdutton Note Added: 0011196 ====================================================================== ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
