From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0001651]: ac3 passthrough not really work with ac3dec Date: Wed, 14 Dec 2005 09:44:36 +0100 Message-ID: <16de7c51254ef43bb85363bb74d73cd8@bugtrack.alsa-project.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [85.132.177.35]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id 93C1D196 for ; Wed, 14 Dec 2005 09:44:36 +0100 (MET) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org The following issue has been SUBMITTED. ====================================================================== ====================================================================== Reported By: tycordinal Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 1651 Category: PCI - emu10k1 Reproducibility: always Severity: minor Priority: normal Status: new Distribution: Kernel Version: 2.4.31 ====================================================================== Date Submitted: 12-14-2005 09:44 CET Last Modified: 12-14-2005 09:44 CET ====================================================================== 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. ====================================================================== 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 ====================================================================== ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click