From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rene Herman Subject: Re: [PATCH] es1968: fix jitter on some maestro cards Date: Mon, 14 Apr 2008 12:43:45 +0200 Message-ID: <48033561.3070309@keyaccess.nl> References: <20080329234943.GA2899@slappy> <47F164AB.5040009@keyaccess.nl> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from smtpq2.tilbu1.nb.home.nl (smtpq2.tilbu1.nb.home.nl [213.51.146.201]) by alsa0.perex.cz (Postfix) with ESMTP id 682E32438F for ; Mon, 14 Apr 2008 12:40:58 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Takashi Iwai Cc: ALSA devel , Andreas Mueller , linux-kernel@vger.kernel.org, MatzeBraun@gmx.de List-Id: alsa-devel@alsa-project.org On 14-04-08 12:22, Takashi Iwai wrote: > At Tue, 01 Apr 2008 00:24:43 +0200, > Rene Herman wrote: >> On 30-03-08 00:49, Andreas Mueller wrote: >> >>> This patch suppresses jitter on several Maestro cards in stereo mode >>> (ALSA of course). >>> >>> The patch is also incorporated in the *BSD drivers where I "ported" it from. >>> I am barely used to driver-development so please take a look (esp. the channel >>> parameters), nevertheless it completely works for me. >>> >>> Without this patch most of the stereo audio gets out of sync and really >>> distorted (oss-emulation with mplayer at 48000khz worked somehow). >>> >>> CCed to those listed in the .c file. >> Added the alsa-devel list (and re-attached the patch). My TerraTec DMX (ESS >> Canyon3D, ES1970MS-3D) doesn't need this but doesn't seem to suffer from it >> either. Otherwise no idea about this. > > This should depend on the sample rate you use. 48k would work without > the patch. Just to be clear archive-wise -- on this Canyon3D, so does 44100. > Anyway, I applied it to ALSA tree now. Thanks. Rene. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754956AbYDNKlO (ORCPT ); Mon, 14 Apr 2008 06:41:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751534AbYDNKk7 (ORCPT ); Mon, 14 Apr 2008 06:40:59 -0400 Received: from smtpq2.tilbu1.nb.home.nl ([213.51.146.201]:46783 "EHLO smtpq2.tilbu1.nb.home.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751209AbYDNKk7 (ORCPT ); Mon, 14 Apr 2008 06:40:59 -0400 Message-ID: <48033561.3070309@keyaccess.nl> Date: Mon, 14 Apr 2008 12:43:45 +0200 From: Rene Herman User-Agent: Thunderbird 2.0.0.12 (X11/20080213) MIME-Version: 1.0 To: Takashi Iwai CC: Andreas Mueller , linux-kernel@vger.kernel.org, MatzeBraun@gmx.de, ALSA devel Subject: Re: [PATCH] es1968: fix jitter on some maestro cards References: <20080329234943.GA2899@slappy> <47F164AB.5040009@keyaccess.nl> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -1.0 (-) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 14-04-08 12:22, Takashi Iwai wrote: > At Tue, 01 Apr 2008 00:24:43 +0200, > Rene Herman wrote: >> On 30-03-08 00:49, Andreas Mueller wrote: >> >>> This patch suppresses jitter on several Maestro cards in stereo mode >>> (ALSA of course). >>> >>> The patch is also incorporated in the *BSD drivers where I "ported" it from. >>> I am barely used to driver-development so please take a look (esp. the channel >>> parameters), nevertheless it completely works for me. >>> >>> Without this patch most of the stereo audio gets out of sync and really >>> distorted (oss-emulation with mplayer at 48000khz worked somehow). >>> >>> CCed to those listed in the .c file. >> Added the alsa-devel list (and re-attached the patch). My TerraTec DMX (ESS >> Canyon3D, ES1970MS-3D) doesn't need this but doesn't seem to suffer from it >> either. Otherwise no idea about this. > > This should depend on the sample rate you use. 48k would work without > the patch. Just to be clear archive-wise -- on this Canyon3D, so does 44100. > Anyway, I applied it to ALSA tree now. Thanks. Rene.