From: Jeff Garzik <jgarzik@mandrakesoft.com>
To: whitney@math.berkeley.edu
Cc: LKML <linux-kernel@vger.kernel.org>,
"William A. Stein" <was@math.harvard.edu>
Subject: Re: via 686a audio driver rate locked at 48Khz
Date: Wed, 28 Feb 2001 18:19:21 -0500 [thread overview]
Message-ID: <3A9D8779.BC475CFC@mandrakesoft.com> (raw)
In-Reply-To: <Pine.LNX.4.30.0102280937520.6854-100000@mf1.private>
Wayne Whitney wrote:
> I have a system with an MSI-6321 motherboard with the Via 686a
> southbridge, and I'm having a little trouble with the via82cxxx_audio
> sound driver. The stock 2.4.2 driver produces only a rhythmic a buzzing
> sound. I saw a patch here a week or two ago for 'rate locking', so I
> tried that (it didn't apply cleanly to 2.4.2, but I think I applied it by
> hand correctly).
FYI I sent that change to Linus just now, and posted a quick update on
the Web site: http://sourceforge.net/projects/gkernel/
> That patch makes some things work fine (e.g. playing a .wav file), but
> others sound lousy (e.g. playing a 44.1KHz mp3 with xmms). Am I correct
> in thinking that it sounds lousy because of the translation from 44.1KHz
> sampling to 48KHz sampling?
Probably.. If you are locked at 48 Khz, -something- has to upsample to
48 Khz if your audio samples are at a different frequency. Of course
you might also be needing more CPU cycles or memory due to the required
upsampling.
> If so, is there any hope of supporting
> Variable Rate on this hardware?
To be honest I don't know yet. I haven't fully assured myself that the
driver is doing things 100% correctly to set up variable rate. There
-are- codecs locked at 48 Khz, so users with those codecs are stuck at
48 Khz..
> Below is copious debugging output, although not the output of
> via-audio-diag, as I could not find it on sourceforge (and the gtf.org URL
> is gone).
It's in the tarball in the download section of
http://sourceforge.net/projects/gkernel/
Jeff
--
Jeff Garzik | "You see, in this world there's two kinds of
Building 1024 | people, my friend: Those with loaded guns
MandrakeSoft | and those who dig. You dig." --Blondie
next prev parent reply other threads:[~2001-02-28 23:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-28 18:31 via 686a audio driver rate locked at 48Khz Wayne Whitney
2001-02-28 23:19 ` Jeff Garzik [this message]
2001-03-02 13:25 ` Sergei Haller
2001-03-02 13:31 ` Jeff Garzik
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