linux-kernel - Re: [PATCH] es1968: fix jitter on some maestro cards

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Message-ID: <48033561.3070309@keyaccess.nl>
Date:	Mon, 14 Apr 2008 12:43:45 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Andreas Mueller <andreas@...pelspeicher.org>,
	linux-kernel@...r.kernel.org, MatzeBraun@....de,
	ALSA devel <alsa-devel@...a-project.org>
Subject: Re: [PATCH] es1968: fix jitter on some maestro cards

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.

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