From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - lib 0000881]: Distorted sound with enabled dmix plugin Date: Wed, 8 Jun 2005 21:13:58 +0200 Message-ID: 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 [82.113.61.162]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id ED5DA1FB for ; Wed, 8 Jun 2005 21:13:58 +0200 (MEST) 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 A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: yure Assigned To: ====================================================================== Project: ALSA - lib Issue ID: 881 Category: 1_pcm - digital audio Reproducibility: always Severity: minor Priority: normal Status: new ====================================================================== Date Submitted: 02-03-2005 12:25 CET Last Modified: 06-08-2005 21:13 CEST ====================================================================== Summary: Distorted sound with enabled dmix plugin Description: After 10-20 minutes listening music with xmms or beep-media-player I hear distorted sound. Appear noise. This problem is appear when enabled dmix plugin through configuration file ~/.asoundrc. ====================================================================== ---------------------------------------------------------------------- tiwai - 06-08-05 16:08 ---------------------------------------------------------------------- I guess it's rather a problem with a specific driver. The dmix is very sensitive to the accuracy of DMA pointer. If the driver returns a wrong DMA pointer, it may result in noises. Also, for 96kHz, you'd need much bigger buffer and period sizes than 48k. Otherwise usual xruns can happen. I suspect xruns rather the existing dmix bugs... ---------------------------------------------------------------------- Xero - 06-08-05 21:13 ---------------------------------------------------------------------- how much bigger is much bigger? I'm running at the standard 1024/8192 for period/buffer size. If that really is the problem then it's still odd that this would happen at 96000 but not 88200, which is why I think it's more related to sample rate conversion...I've attached my config file at 96000 for reference. When in 88200 the only change is just that, 88200 instead of 96000 in the rate section. Issue History Date Modified Username Field Change ====================================================================== 02-03-05 12:25 yure New Issue 02-04-05 10:39 yure Note Added: 0003497 02-04-05 10:39 yure Issue Monitored: yure 02-04-05 14:53 tiwai Note Added: 0003506 02-04-05 15:30 yure Note Added: 0003508 02-04-05 15:36 yure Note Added: 0003509 02-23-05 13:35 yure Note Added: 0003711 02-23-05 19:23 tiwai Note Added: 0003713 02-23-05 19:23 tiwai File Added: pcm-silent-fix.diff 02-23-05 19:24 tiwai Note Added: 0003714 02-23-05 19:33 tiwai Note Added: 0003715 02-24-05 22:09 tiwai Note Added: 0003729 02-24-05 22:09 tiwai File Added: bmp-0.9.7-alsa-fixes.patch 02-25-05 10:36 yure Note Added: 0003732 02-28-05 15:00 tvignaud Note Added: 0003744 02-28-05 15:22 yure Note Added: 0003745 02-28-05 15:26 warly Note Added: 0003746 03-11-05 13:06 tvignaud Note Added: 0003887 03-11-05 16:17 tiwai Note Added: 0003891 03-23-05 20:46 tiwai Note Added: 0004187 03-23-05 20:47 tiwai File Added: dmix-slowptr.diff 03-25-05 14:56 tvignaud Note Added: 0004206 03-29-05 16:21 tiwai Note Added: 0004246 04-04-05 16:15 yure Note Added: 0004327 04-29-05 09:07 mandreiana Issue Monitored: mandreiana 05-29-05 08:23 Xero Note Added: 0004781 05-29-05 08:29 Xero Note Added: 0004782 06-03-05 07:40 Xero Note Added: 0004882 06-08-05 16:08 tiwai Note Added: 0004944 06-08-05 21:13 Xero Note Added: 0004973 ====================================================================== ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20