Klarinet Archive - Posting 000452.txt from 1997/11

From: Martin Pergler <pergler@-----.edu>
Subj: Scoping the clarinet
Date: Wed, 12 Nov 1997 00:38:25 -0500

In response to my message earlier, several people have asked what
set-up I use for "putting the clarinet on an oscilloscope".
The answer is nothing complicated.

I have an IBM-type notebook running Win 3.1 with internal
SoundBlaster-type audio. It has a built-in mike but I actually
plug in a Sony ECM 737 stereo mike. A few years
ago, I picked up a pair of DOS programs on the Web. One is
called FFT-Scope, which makes your computer screen into a
standard ampliude.vs.time scope. It also has a FFT module
for finding the frequency decomposition, but I prefer a little
program called FREQ for this which is easier to control, I find.
Both work by doing a fast fourier transform of chunks of the data.

The GoldWave .WAV editor also I think has scope display while
you're recording and you can set it to show a little
frequency analyser instead. I don't have GoldWave on this machine.

I'm sure there are more modern programs out there which do this,
but no fancy hardware needed. As long as you can record .WAV
files it ought to work. I can plop FFT-Scope and FREQ
on my web page if people want; I think they're freeware though
I'll have to check the docs.

I don't know about Macs. Something like this must exist.

Martin

-------------------------------------------------------
Martin Pergler pergler@-----.edu
Grad student, Mathematics http://www.math.uchicago.edu/~pergler
Univ. of Chicago