Actually you could halve that sample rate to 11 K and still have good
intelligibility. Using the Nyquest theorem, the highest frequency you
can record at a given sample rate is approximately less than half its
sample rate. AM broadcast stations cut off at 5khz, which can be
handled easily by the 11k sample rate.
This is not 11 k bits per second, like in MP3s, but a full parallel
16 bits at 11k and without compression, will have no artifacts, just
bandwidth reduction - i.e. less high end.
sqb
OK, yes, it works... but one must stick with the default codec
"none" ... any attempt to set it to ulaw with the USB mic doesn't
work... and touching the input setting can also be a problem (i.e.
"dflt" is what we want.... nothing else)
But anyway, it doesn't seem to matter too muich. For voice I'm
getting small file sizes at 16 bit, 22.01kHz. (8 bit introduces to
much hiss and pops.) Setting the record format to "wave" and the
file extension to ".wav" means it boots on both platforms which is
great... WMP on Windows and QT on the Mac.
[ if you want quality -- giant files...
set the recordsamplesize to 128.21
set the recordrate to 44.1
]
--
stephen barncard
s a n f r a n c i s c o
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