[sdiy] crazy module/cordless patching idea??

[Grant Richter]

Regular VCO's have a Low and Audio range. I wonder if an RF range couldn't
produce interesting heterodynes and other noisy effects. Definitely
experimental, but AM and FM sure would be easy to do. Just make the timing
cap real small.

Dan Slater told me he likes to patch up complex communication channels on a
modular, them mess with the signal before the demodulator. A multiplier is
after all equivalent to an RF mixer. It can also be used as a phase detector
for phase modulation.

A VCO through a VCA is an AM encoder and an envelope follower is an AM
detector. Morton Subotnick used this technique to store control voltages on
audio tape in the "Ghost Electronics". I've been told the latter versions
were FM encoded using some "black boxes".

A modular synth is probably already producing a fair amount of RF energy, if
the rise times are fast enough. Has anybody tried placing an AM radio close
to the patchcords of a Serge? Interesting new way to hear it maybe. My
shortwave radio has a low band that goes down to 110 Khz. Which is a Marine
band where they have LORAN and emergency weather info.

> From: "med" <teenagewasteland at prodigy.net>
> Date: Mon, 16 Sep 2002 21:01:43 -0500
> To: <synth-diy at dropmix.xs4all.nl>
> Subject: [sdiy] crazy module/cordless patching idea??
> 
> Hello to the list. First idea posted, it's a bit sketchy, i've worked
> out *none* of it.
> A few days ago i was thinking, actually about a wireless guitar
> transmitter/receiver pair like Shure put out, and it combined with
> thoughts of the "how the hell to do many patches?" concept.
> Outputs have a radio transmitter at some frequency (each a different
> one, naturally). It doesn't have to be high-powered, just enough to go
> a few yards (at extreme most). At each input is a receiver. (plus a
> few regular audio ins, of course) Care would have to be taken to not
> make your frequency anything used elsewhere, (though that would be a
> cool effect -- combining a synth lead with talk radio...)
> 
> For instance, your keyboard makes a CV, which goes to a transmitter.
> That is received by the VCO in. VCO out has another radio transmitter.
> Every input you want to connect, you tune to that frequency. You could
> patch across a room (granted, you'd have to bring antennae out if your
> front panel was shielded worth a damn.) S/N issues could be handled
> (to some degree) by increasing the transmitting signal.
> 
> Just food for thought,
> -MED
> (who some day might build something like that -- though he'd have to
> be mad...)
> 
> 
>