ModularSynthesis - Buchla 257 Control Voltage Processor
the one hundreds – Buchla 100
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
Buchla 256e Control Voltage Processor: Applications, Use, and Tricks - YouTube