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Date:      Fri, 29 Mar 2002 15:49:53 +0100
From:      Rahul Siddharthan <rsidd@online.fr>
To:        "Adam D. Gorski" <agorski@engin.umich.edu>
Cc:        John Utz <john@utzweb.net>, freebsd-multimedia@FreeBSD.ORG
Subject:   Re: SB problem (was: Cat'ing /dev/audio)
Message-ID:  <20020329154953.I53370@lpt.ens.fr>
In-Reply-To: <Pine.SOL.4.33.0203290840060.2808-100000@and.engin.umich.edu>; from agorski@engin.umich.edu on Fri, Mar 29, 2002 at 08:54:49AM -0500
References:  <Pine.LNX.4.44.0203282314560.25756-100000@jupiter.linuxengine.net> <Pine.SOL.4.33.0203290840060.2808-100000@and.engin.umich.edu>

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Adam D. Gorski said on Mar 29, 2002 at 08:54:49:
> Ok, let me be a bit more specific. I actually e-mailed this list about this
> problem about a week ago, but got no response. So here are the details.
> 
> I moved to FreeBSD just recently from Slackware. Everything runs
> beautifully, except my sound. I originally had a SB PCI 64 (es1370 chip) in
> my box, which Linux loved and everything was happy. However, under FreeBSD,
> playing mp3/ogg files produced terrible popping/screeching that made the
> music unlistenable. Note: under Linux, I had no problems. My box is a p2-450
> with 256 megs of ram, so I would think that playing mp3's wouldn't be an
> issue.

Does your card work with a fixed sampling rate, or is it variable?

The problem sounds familiar: I had the same problems when downsampling
from the 48000 Hz input of my sound card to a 44100 Hz file.  I'm told
that if you needed to downsample output the same thing would happen; I
needed to upsample output from 44100 to 48000 and would get some minor
distortion but nothing serious.

I got around that small distortion by sending my output through arts
(kde's sound daemon) configured to output at 48000 Hz; apparently
arts's upsampling worked better than the native driver's.  You could
try something like that too, or get hold of a sound file whose
rate is the same as your card's and play that directly.

Rahul

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