wrote:
>
> I occasionally put up sounds on the web for Journey North. I want the sounds
> to be clear and good quality, but don't want them to be so high quality that
> anyone would be able to copy them from the web to use for other purposes. So
> using Cool Edit I convert them to mono and compress them to a sampling rate
> of 16000, as .wav files. This easily brings most of the files down to 300
> KBs, and they're easily readable on most computers.
Be careful lowering sampling rates too low. The maximum frequency of
call you can reproduce is half the sampling rate, and the higher part of
what's reproduced won't be all that great as there simply will not be
enough samples. I know of one site, for instance, that put up frogcalls
sampled at 8k. And two of the frogs on the site have calls that are
above 4k. One has a call that's about 7.5k. Yes, there's something in
their call sample, a bunch of garbage artifacts that bear no resemblance
to the call except for timing. (And I've told them what's wrong several
times over the past few years)
Best way to find out what the call has in it is to do a sonogram.
Walt
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