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Date:      Mon, 3 Sep 2001 15:38:39 +0200
From:      "Jose M. Alcaide" <jose@we.lc.ehu.es>
To:        Cameron Grant <gandalf@vilnya.demon.co.uk>
Cc:        multimedia@FreeBSD.org
Subject:   Re: audio problems (Maestro-2E) after updating to 4.4-RC
Message-ID:  <20010903153839.A377@v-ger.we.lc.ehu.es>
In-Reply-To: <20010829121559.B322@v-ger.we.lc.ehu.es>; from jose@we.lc.ehu.es on Wed, Aug 29, 2001 at 12:15:59PM %2B0200
References:  <20010829121559.B322@v-ger.we.lc.ehu.es>

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On Wed, Aug 29, 2001 at 12:15:59PM +0200, Jose M. Alcaide wrote:
> I have just updated my laptop (Dell Inspiron 3700, which uses the ESS
> Maestro-2E chip) to 4.4-RC, and now audio playing is seriously broken:
> there is a gap just after starting to play a sound and, in addition,
> playing stops too early. These effects are more noticeable with short
> sounds sampled at 8 KHz (I send attached a file "splat.au" in µ-law
> format, 8 bit, 8 KHz; simply type "cat splat.au > /dev/audio").
> 
> Since I am using kernel loadable modules for the sound driver, I borrowed
> the snd_maestro.ko and sound_pcm.ko modules from a 4.3-RELEASE system and
> then audio playing worked fine again.
> 

I have just rebuilt snd_pcm.ko, and the last MFC of pcm/channel.h improved
the situation: the gaps/pauses while playing are gone.  However, there are
still short sounds that do not play (using esd). It seems that there is a
delay just after opening the audio device; if the sound is too short
(shorter than that delay), nothing is played.

The problem with 8-bit/8KHz µ-law sounds played using the command
"cat soundfile > /dev/audio" still happens. In fact, now it is worse.

Just FYI.

  JMA
-- 
****** Jose M. Alcaide  //  jose@we.lc.ehu.es  //  jmas@FreeBSD.org ******
** "Beware of Programmers who carry screwdrivers" --  Leonard Brandwein **

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