Date: Wed, 12 Feb 2003 07:47:23 +0100 (MET) From: Peter B <pb@ludd.luth.se> To: steve@sohara.org (Steve O'Hara-Smith) Cc: freebsd-multimedia@FreeBSD.org Subject: Re: Bt878 builtin audio adc + 2xBug Message-ID: <200302120647.h1C6lNY24874@brother.ludd.luth.se> In-Reply-To: <20030212073103.08d14b06.steve@sohara.org> from "Steve O'Hara-Smith" at "Feb 12, 2003 07:31:03 am"
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Steve O'Hara-Smith wrote: >On Wed, 12 Feb 2003 06:24:06 +0100 (MET) >Peter B <pb@ludd.luth.se> wrote: > >PB> Indeed on a linux 2.4.18 installation there is a driver: >PB> /usr/src/linux/drivers/sound/btaudio.c >PB> And documentation: >PB> /usr/src/linux/Documentation/sound/btaudio >PB> Which says it supports two modes: digital via I2S and normal adc. >PB> And it will only record audio. > > Sounds ripe for a port into the pcm framework. Question is if anyone will do it =) Althought it should be quite straightforward. Neither audio, pci, or bt878 is anything new. > The white noise is I think an A7V333 problem - I get bus noise >through mine. It's quite severe when it's there: http://wave.campus.luth.se/~pb/tmp/brooktree_recordnoise.wav Normal noise is quite ok althought: http://wave.campus.luth.se/~pb/tmp/brooktree_record.wav > The freeze up is strange! It smells kernel allocation long way. But I read the kernel config and it seems to allocate the appropiete number of pages. Maybe one should increase it more than it says. "options BROOKTREE_ALLOC_PAGES=xxx" might be the fix.. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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