What it does
Sawtooth panner built from scratch
Illustrates how to build a stereo sawtooth auto-panner by multiplying a mono audio signal by separate "left" and "right" amplitude modulation signals which are then "zipped up" to form a stereo output. The Up-Down Ramp Control Generator is used to generate a ramp signal which rises from 0 to 1 then falls back to 0 over a user-selectable duration. This double-sided ramp signal represents the sawtooth wave. The "One minus Control" block is used to distribute that portion of the signal power which is not going to the left channel.This is only one example of how to distibute the signal between the channels. Other variations on the theme are, of course, entirely possible.
Likewise, the structure can easily be extended to generate multi-channel panners instead of merely stereo (i.e. 2 channels).