I made a bank of VCO’s, offset them a bit, then sent each one into a pitch quantizer. This meant that as the CV input changed, the pitches would all move together, but stay in the same key, sort of like mashing down the white keys on a piano – that’s the pandiatonic part. Then I modulated the CV going into the VCO’s, which caused them to go up and down accordingly. One of my favorite sounds… blocks of dense diatonic chords.