Drone, audio processing and voice panel
Two Dual Universal Slope Generators (1970s layout) with unipolar outputs.
Wave Multipliers.
Resonant EQ with additional 1/8" i/o and detented potentiometers.
Four-channel matrix mixer with additional 1/8" i/o and switchable potentiometer modes (unipolar or bipolar) per row.
https://www.elby-designs.com/webtek/cgs/voltron/voltron.html