Archive of the former Yahoo!Groups mailing list: MOTM

(Sorry if this posts more than once - having problems with my email service
today...)

The 125 looks like one very cool module!

If I'm reading this correctly, it will convert a normal triangle wave from a
VCO into a square wave, and by modulating a CV input with say a triangle
from an LFO, will split each square wave cycle into a pulse train of 2, 3
then 4 pulses per cycle, then back to 3, 2 and then square again. This
would cause fairly drastic changes in timbre by adding and removing
harmonics from the output waveform. Actually, it would sound like adding a
2nd, then 3rd and finally 4th harmonic, then subtracting them back out in
reverse order, in cyclic fashion. Very cool. If an envelope generator were
used as the CV, then the initial waveform output could be made to include
the harmonics, and then decay them over time. Also very cool.

In typical MOTM style, maybe this circuit could be tricked up with one or
more of the following ideas:

1. Go all the way to the 8th (or 12th) harmonic - I guess that would
require 3 (or 6) more ICs and a few dozen resistors.
2. Add a waveshaping section to the output to possibly provide saw and/or
sine outputs (probably a lot of parts, though).
3. Provide an attenuator for each of the outputs - to control the amplitude
of each harmonic in the final output waveform.

Fun!!
George