I have to say, I ∗∗REALLY∗∗ like the sound (er, concept) of the SSO.
As for the additive DCO; sounds like a great idea. And for the wavetable,
Blacet will (I think?) be offering a mini Wiard wavetable thingy in the
undisclosed future.
But I've never heard of an idea like this SSO. And it sounds massively
interesting.
--PBr
-----Original Message-----
From:
bruce@... [mailto:
bruce@...]
Sent: Tuesday, February 13, 2001 7:05 PM
To:
motm@yahoogroups.comSubject: [motm] Re: Modular Of The Millenium (Long)
SSO - Spiral Synthesis Osc
Once upon a time, some wacky guy was looking at the physics and
calculus behind spring motion. Those of you who took too much collage
calculus or physics know that the Fourier functions that lie at the
guts of DSP also seem to have this grip over springs, slinkys and
blocks of Jello. While to most this is the subject of annoyance or at
worst difficult omputations, I say we put this to our use! So imagine
if you would that we have this really wonderful spring, and we can
control some of its motion through control voltages. Now shine a
light from above the spring onto a piece of paper below it. It
produces a shadow that looks a lot like a wave form! Ok, lets output
that wave form. Gee... sounds kinda... weird... But wait! Theres more.
Lets make this spring out of some stuff that no one has ever seen
before, and allow it to operation in more than just 3 dimensions, lets
be able to warp and reflect and twist it based on control voltages.
Now you are talking weird stuff. (ok, I coded this one in school.... It
is one fruity sound generator). Once again we have control voltages
that determine the fundamental frequency of the output spiral
waveform. Here are some of the control inputs that I think would be
fun, and what they do
· Pitch - Just like the VCO that exists today. There would be CV
inputs for this, as well as a coarse and fine adjustment on the front
panel
· Drive Waveform - a CV input from an audio VCO. More about the
horror this could cause in a bit. If you don't supply this it uses
its internal sawtooth
Control Modifiers (some of these are weird, ok - But remember the
shadow metaphor)
· X Reflect +/- - Think if it as using a CV to folding a single cycle
of the waveform about the X axis.
· Y Refect +/- - Think if it as using a CV to do the same to the Y
Axis
· X Sheer +/- Think of it as using a CV to move the light source along
the X Axis
· Y Sheer +/- Same trick to the Y Axis
· Twist + / - - How much torque you put on the spring. Oh yeah, audio
CV in this one and the world comes unglued
· Dither - This would be placing a diffuse sheet between the spring
and the paper that shows our wave form.