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----- Original Message ----- From: "Bill Fox" <billfox@fast.net> > The oscillator that clocks the delay line is a VCO. Modulating the VCO changes > the speed at which samples are stored and retrieved from memory, thus changing > the delay time. Of couse, anything clocked out of RAM at a different speed than > it was clocked in, will have its pitch changed. If you use a very short delay and modulate the VCO with a low frequency triangle or sine wave, the resulting effect is what we call chorus. What happens is the delayed material is shifed up and down slightly in pitch and when mixed with the unshifted signal the result is much thicker harmonically. -Vance