[sdiy] LFO with variable waveshaping

[eq927 at freenet.carleton.ca]

Hi Luis,
I think one of the MOTM VC LFOs does exactly this - but maybe not.
You could try implementing a voltage-controlled version of the Korg 
MS-20 LFO, replacing the potentiometer with a suitable 
voltage-controlled equivalent... if you can invent one. Modulating the 
waveshape without affecting the frequency is the real challenge - or 
modulate the waveshape and compensate for the frequency variation. 

The other method is to take an existing LFO waveform and warp it under 
voltage control - look up "Tillman modulator" in the archives - a 
possible design that Don Tillman suggested a couple of years ago.
Regards, Mike