Archive of the former Yahoo!Groups mailing list: MOTM

Here's a weird one... anyone think of how this could be done with
conventional modules, or otherwise (I have to keep you clever people
challenged)?

How can I describe this. Is there any way to transform a CV so that, lets
say on a graph, as the input CV rises linearly, the output goes up, down, up
down? Kind of sinusoidally?

Know what I mean?

Say you were applying this to a keyboard voltage. As you played up the
keyboard, the transformed voltage would rise to say 5v, then start dropping
back to 0v, rise to 5v...

At one setting, for example, it could be that the output CV rose as you
approach "F," peaks at 5v on F, starts dropping back to 0v ast you approach
C-ish, then rises agin to hit 5v at the next "F" .... I don't know how else
to describe the effect I'm after.

Why do I ask? Well, anything that can mangle a CV in a repeatable way is
useful to me in a modular, for one thing. This particular idea arose from
some daydreaming I'm doing about creating formats in a weird, roundabout way
and it occured to me that I couldn't think of how to do this. I imagine a
module that would take a CV in and, over its range, convert it to the above
with an adjustable number/placement of 'humps.'

In fact, in the past I've often thought about a general Transform
Module---CV in, CV out, and a rotary switch for transform 'type' with a knob
to adjust it's effect. Transforms available might be Linear (no effect),
Exponmential, Anti-log, Sigmoid, etc. etc. Plus the weird effect I can't
even name, above. The thinking for this Transform Module came out of some
stuff I was doing late last year working on moving neural net concepts over
to a modular synthesizer. Part of it is haunting me again.

Okay, I know you're all saying, "What's a _matter_ with this guy, anyway?"