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
----- Original Message -----
From: The Old Crow <oldcrow@...>
To: MOTM List <motm@yahoogroups.com>
Sent: Wednesday, April 10, 2002 10:09 AM
Subject: Re: [motm] Shhhhhh!
> On Wed, 10 Apr 2002, J. Larry Hendry wrote:
>
> > > Boy, it sure is quiet on the list. A question for
> > > anyone who attended AHMW: how were the
> > > new MOTM modules - 480, 125, etc?
>
> > 480 filter = Exictingly bland, if that makes sense. The filter is not
mean,
>
> I prefer the word 'subtle'. You can get a fair amount of resonance out
> of both sections, but that requires both res. controls set to 10 ∗and∗
> some additional res. CV applied. This was the best way I could figure to
> deal with the CS-50/60/80's individual res. controls and the 'global' res.
> control ('global' control became the res. CV jack).
>
> > 125 pulse wave multiplier = unique. Being relatively new to modular use
I
>
> What I call the 125 (Paul may elect to use another number) is not an
> "instant gratification" module. You have to tweak it to find a 'sweet
> spot'. Here is Anderton's article on his PWMult:
>
> http://www.oldcrows.net/~oldcrow/schemos/CA-PWM_01.GIF
> http://www.oldcrows.net/~oldcrow/schemos/CA-PWM_02.GIF
>
> It is the attack phase of a string sound (not brass) that this sort of
> module would assist: one can select a 'burst' of harmonics that dissipate
> in a controlled order after the trigger arrives.
>
> Also: Larry's Magic Buss is really nice. Takes one session with patch
> cables to figure out. The cabinet Larry had built was made with the buss
> in mind--I want several of these for myself.
>
>
> Crow
> /∗∗/
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>