Date: Mon, 18 Dec 2000 00:17:44 -0700 From: dlm-fbmm@weaselfish.com To: freebsd-multimedia@freebsd.org Subject: "blips" on ES1371 when playing WAVs Message-ID: <200012180717.eBI7HiD09739@green-dome.village.org>
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I have a "AudioPCI ES1371" according to pcm's probe, and am running 4.1-RELEASE. I've ripped various cds, producing a bunch of WAV files (hey, if you've got the disk space, why throw away musical content by doing a lossy compression?). I'm using splay (0.8.2) and waveplay (2000.12.10) to play them. The ripping was done with dagrab (0.3.5), which reported that it didn't need to do any jitter corrections. The problem I'm having is that I'm getting "blip"-like noises, several per second (hard to count, but they're well-spaced enough that most of the music comes through ok, maybe 5-10?). It seems to take a few seconds for them to start happening. As best I can tell, I'm not getting analog clipping (if so, it's in the ES1371; haven't actually dragged an o'scope out yet). The same problem happens with MP3s, and has no apparent correlation with other system activity (the machine is used as an ssh-capable X terminal). The source filesystem has 32KB blocks and fragments, and 128 cylinders per group. The drive is "ata1-slave using UDMA66", and has dma enabled. The master on that bus is a DVD player which is not in use at the moment. Beyond the obvious things I've alluded to checking above, the only theory I've been able to come up with is that 32KB is roughly 200ms, and I could believe I'm getting five blips per second, which would indicate a problem at filesystem block boundaries. Not sure how to test that, though. Has anyone else encountered this, or have suggestions as to how to make it go away? Dworkin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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