We are facing problems with two-channel audio recording:
audiorecord -c 1 foo.wav
...works great, but:
audiorecord -c 2 foo.wav
...gives basically just noise. (The noise is reduced when you talk in the
microphone, though.) This problem has been experienced on a Solaris 10 x86
machine, with all updates installed, using two different DTUs (generation
1 and 2). On another system, based on the SPARC platform, we don't see
this problem. I guess the problem might be that the DTUs does not support
two channels, but: According to the utaudio man page, two channels should
be simulated:
"Some input devices do not support 2-channel capture, but two channels
will be reproduced by duplication in the case where two channels are
requested and the device supports only one."
At this point, I think it looks like utaudio does not handle two channel
simulation on the x86 platform properly.
I've found this posting as well:
http://article.gmane.org/gmane.os.solaris.sunray/2288/. It doesn't mention
if the Solaris 10 host is SPARC or x86, but the problem description seems
to match we are are seeing.
Can perhaps someone out there try "audiorecord -c 2 foo.wav" on x86 and
report the result?
Best regards,
---
Peter Åstrand ThinLinc Chief Developer
Cendio AB http://www.cendio.se
Wallenbergs gata 4
583 30 Linköping Phone: +46-13-21 46 00
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