This simple patch consist of a square wave going thru a ssm2044 filter.
This file is in ADPCM .wav format, 16 bits,32khz

There is two sweep of the cutoff frequency (close-open-close) but the second
time the resonnance is crank up.


VCO---> VCF ---> VCA --->output

all the module are in Barry Klein's book.

Vco=Electronote tri-square

Vcf=ssm2044 
Vca=ca3080