Only 2 out of 4 oscillators have a pitch setting (lack of space on this module), the other 2 have a trimmer, but a switch allows you to go from 2 oscillators to 4.
Reprazent da HAD! That Logic Noise series is a great intermediate step for anyone looking to go beyond the one-transistor oscillator that occupies so much of this board. Now I can’t find the thread with the cymbal I made from roughly the same circuit.
I guess I should have posted this to the mail thread before I started building, but I’ve been optimizing my build process lately and got a bit carried away (need to do some tests before I populate the noise section)
EDIT1: It works! The tuning voltage range is larger than expected, though, so something’s not working as expected. Or I cannot math. Probably the latter.
EDIT2: Oops, the noise generator has a “have you tried turning it off and on again” issue. Stupid capacitor left behind from an earlier iteration (one more thing for the checklist, I guess). Bodged on an extra resistor, and now all’s well (need to tweak some levels, though).