Originally Posted by TDFiend
but now i have a better understnading of it - the saw wave produces the blackface choppiness (tremolo) and the square wave produces the pitch modulation (vibrato)
Um, no, that's completely wrong. The TR-2 only produces Tremolo, i.e., volume modulation. The square wave is choppy, the sawtooth wave is smooth. That pedal does not produce pitch modulation at all.