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Hi all! So here's an interesting one for the Parenthesis: what if you wanted to include an expression pedal input to control the Octave blend instead of (or I guess in addition to) the included potentiometer? Is this something feasible with the current board layout?
Hey all, thought I'd bump this rather than start a new thread. Recently built a Parenthesis mini with an expression input for the octave. Wired up like the above link in the wiki page. Using a Moog expression pedal (100k) and it works...sorta. With the treadle about half way depressed you get the full octave effect, depressed all the way down things start sounding crappy. Figured I could throw some parallel resistors across the expression pedal pot to get it down to match the 50k of the octave pot, but it had no discernible change to the sweep. Is there something I'm missing?
I guess I was wrongly under the impression the output knob limited the sweep the other way (no idea where I got that from). Anyway, with the output knob around 1 o'clock it works as it should. Out of curiosity I swapped the GE diodes for some higher output ones (around 35fv) and that allowed the output pot on the expression pedal to be turned a little more toward max. Seems the GE diodes in this guy are incredibly particular. I ended up with my original D9K's (around 26fv) as I liked the effect a bit more. Curious what diodes are you running in your builds?