ModularSynthesis - Buchla 257 Control Voltage Processor
L67 "Buchla" 156 Control Voltage Processor clone | Low-Gain | Reverb
File:Buchla 147 Sequential Voltage Source module (16-step x 3-layers), 114 10-Touch-Controlled Voltage Sources module (capacitive keyboard) - Buchla 100 at NYU (left).jpg - Wikimedia Commons