Date: Mon, 16 Jun 2003 00:57:10 -0400 From: Carl McTague <mctague@santafe.edu> To: freebsd-newbies@freebsd.org, freebsd-multimedia@freebsd.org Subject: choppy dsp (mono/stereo problem?) Message-ID: <20030616045710.GA6358@xi.storrs.net>
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Hi, I'm trying to use ohphone, but am having a low-level problem with sound-in; it sounds choppy; it sounds as though a mono signal encoded in stereo with a silent channel is being misinterpreted as a single mono stream. For example, if the sound was abcd it plays back a0b0c0d0 (where 0 is silence). I can reproduce the same choppyness by running: wavrec test.wav (installed from the ports). But in this case, I can fix it by doing wavrec -S test.wav where -S "set[s] stereo mode." I get the same thing within xwave by changing between mono and stereo record modes. Furthermore, I if I do cat /dev/audio > test.raw cat test.raw > /dev/audio I get a similar (but somewhat more severe) choppiness. Any ideas? I'm using 4.7-RELEASE and (carl@xi:~) cat /dev/sndstat FreeBSD Audio Driver (newpcm) Installed devices: pcm0: <Intel 82801CA (ICH3)> at io 0xd800, 0xdc80 irq 11 bufsz 16384 (1p/2r/0v channels duplex) Thanks.
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