MOTM

I just designed a 1U module for my MOTM system that combines a "control
voltage processor" of sorts and a comparator.  It has a DC mixer with 2
pot-attenuated inputs, plus a separate comparator.  Unique about this module
is the third pot which can be used either for DC bias on the mixer or for
setting the comparison voltage.  A switch selects whether the bias pot goes
to the mixer or to the comparator.  (If the bias pot is on the mixer, the
comparator switches at zero-crossing.  Perfect for getting a square wave
from a MOTM-380 Quad LFO.  Flip the bias switch to the comparator and you
have manual control over the pulse width.)  There is also an inverter
output, switch selectable to be the inversion of the mix output or of the
comparator output.  There are many sorts of control voltage processing
(clipping, full wave rectifying, etc.), but attenuate, mix, invert and
offset are the basic ones.  The mixer output is normalled into the
comparator input.  (Three inputs, three outputs, three pots, two switches.)
It will use a Schaeffer panel and a Stooge bracket.

I am building two of these, even though I only have room left for 1U in my
26U Synthesizers.com cabinet.  Guess one will have to go into the next
cabinet (the one with the 3-voltage power supply and the MOTM 500 series
modules).

I have also just ordered the entire Electronotes package ($265) from Bernie
Hutchins.  Looks like I will be designing more modules and panels.  This
could get addictive.

A trigger delay could be a very simple module with one input and one output,
with a manual delay control.  Or it could be made fancy and have a
voltage-controlled delay (yes!).  Now you've got me thinking.

-Richard



----- Original Message -----
From: "Inform3r" <inform3r@...>
To: "MOTM List" <motm@yahoogroups.com>
Sent: Thursday, October 03, 2002 7:42 PM
Subject: [motm] Trigger Delay & CVP


>     I've been reading through Allen Strange's book "electronic music...."
> Two modules he mentioned that caught my attention were:
>
> 1. Trigger Delay
> 2. Control Voltage Processor
>
>     The trigger delay Is something I've found myself wanting for a while,
> and the control voltage processor is a great utility module for inverting
> voltages, etc...
>     Have any other MOTM'ers ever had any thoughts about these? Anyone ever
> put together their own trigger delay?
>
>                 Thanks,
>                 John
>
>