From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0000986]: snd-ice1724 outputs white noise on rear surround output of Chaintech AV-710 Date: Sun, 8 May 2005 20:49:37 +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.alsa-project.org (ALSA's E-mail Delivery System) with ESMTP id 38A40248 for ; Sun, 8 May 2005 20:49:38 +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: AdamW Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 986 Category: PCI - ice1724 Reproducibility: always Severity: minor Priority: normal Status: new Distribution: Mandrakelinux Cooker Kernel Version: 2.6.11 ====================================================================== Date Submitted: 03-12-2005 22:43 CET Last Modified: 05-08-2005 20:49 CEST ====================================================================== Summary: snd-ice1724 outputs white noise on rear surround output of Chaintech AV-710 Description: A little background. The Chaintech AV-710 soundcard is a 7.1 soundcard which uses this driver. It has two DACs. There's a standard DAC that drives the first six channels. The rear surround channels, however, are driven by a high-quality Wolfson DAC. Audio enthusiasts like to set the card to drive the main two channels through this DAC instead in order to get a very high quality stereo line-level output. The card's Windows driver has an option to do just this, and in the past people have been successful doing it on Linux. I am attaching an asound.state file which owners of this card used with ALSA 1.0.7 to achieve this. However, I am having trouble getting this to work with ALSA 1.0.8. The rear surround output just produces white noise all the time. This is the case both with this asound.state loaded and also with default levels (i.e., what I get if I wipe /etc/asound.state and re-run alsaconf). It'd be nice to know what changed between 1.0.7 and 1.0.8 that caused this to break, and how to fix it. Thanks! ====================================================================== ---------------------------------------------------------------------- jamesferguson - 04-29-05 15:24 ---------------------------------------------------------------------- Just a quick note to say there are others very interested in this issue for reasons given by AdamW, in particular in the MythTv/KnoppMyth community. I would be happy to lend my card to a developer who can help, though postage outside the USA would probably not be worthwhile... Alternatively, I'd club up with some others to buy a card for a developer (they're cheap). ---------------------------------------------------------------------- jaanusk_ - 05-08-05 20:49 ---------------------------------------------------------------------- Uploaded patch which fixes this issue for me. Alsa didn't initialize wolfson codec , added rudimentary init code to amp.[c, h]. WM8728 and vt1721 are connected using I2C, wm has address 0x36, audio transport using 24bit I2S. Summary: Add WM8728 initialization to amp2000 This patch makes it possible to use the higher quality wolfson dac. Signed-off-by: Jaanus Kivistik Issue History Date Modified Username Field Change ====================================================================== 03-12-05 22:43 AdamW New Issue 03-12-05 22:43 AdamW File Added: asound.state 03-12-05 22:43 AdamW Distribution => Mandrakelinux Cooker 03-12-05 22:43 AdamW Kernel Version => 2.6.11 03-14-05 16:23 AdamW Note Added: 0003904 03-19-05 08:17 AdamW Note Added: 0004010 04-29-05 15:18 jamesferguson Issue Monitored: jamesferguson 04-29-05 15:24 jamesferguson Note Added: 0004579 05-08-05 20:46 jaanusk_ File Added: amp2000_wm8728.patch 05-08-05 20:49 jaanusk_ Note Added: 0004619 ====================================================================== ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. Get your fingers limbered up and give it your best shot. 4 great events, 4 opportunities to win big! Highest score wins.NEC IT Guy Games. Play to win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20