Date: Sat, 15 Dec 2001 19:23:52 -0500 From: Randall Hopper <aa8vb@nc.rr.com> To: "David C. Myers" <myers@aedifice.net> Cc: freebsd-multimedia@FreeBSD.ORG Subject: Re: " no sound from CMedia 8738 " Message-ID: <20011215192352.A7372@nc.rr.com> In-Reply-To: <1008445643.320.2.camel@marburg.aedifice.net>; from myers@aedifice.net on Sat, Dec 15, 2001 at 11:47:22AM -0800 References: <200112151643.fBFGhqw83715@mule.aciri.org> <1008445643.320.2.camel@marburg.aedifice.net>
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David C. Myers:
|None of these scenarios work. In each case, the behavior is the same:
|mpg123 appears to be playing the file, but no sound comes out.
|
|you can specify a non-existent audio device (like /dev/blah or
|something), and mpg123 doesn't complain at all. It still appears to be
|playing the file. From a truss log, I never see it opening /dev/audio.
|Instead, it's loading a lot of ESD-related stuff. So maybe that's not a
|good test...
...
|On the other hand, I can do something like this: 'cat <file> >
|/dev/audio', and static does come out of the speakers. Same with
|/dev/dsp.
Well, I don't know what is wrong there, but just as a data point my CMedia
8738 works pretty well with FreeBSD 4.3-stable circa June '01. The only
dsp-out problem I have with it is that once and a while with xmms, I get
small "skips" in the audio. It's not frequent, but occassionally it's like
the driver overwrites the DMA buffer before it's finished playing it.
> dmesg | grep -i cmedia
pcm0: <CMedia CMI8738> port 0xa400-0xa4ff irq 10 at device 5.0 on pci0
I have this in my kernel config:
device pcm0
device sbc0 at isa? port 0x220 irq 5 drq 1 flags 0x15
device pca0 at isa? port IO_TIMER1
Since /dev/audio seems to be somewhat functional there, this should be a
good test to see how well it actually works:
mpg123 -s SomeSong.mp3 | \
sox -t raw -s -r 44100 -w -c 2 - -t raw -U -b -c 1 -r 8012 /dev/audio
Randall
--
Randall Hopper
aa8vb@nc.rr.com
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