Messages in this thread | | | Date | Wed, 28 Feb 2001 18:19:21 -0500 | From | Jeff Garzik <> | Subject | Re: via 686a audio driver rate locked at 48Khz |
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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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