Banana jack colors on the Buchla 200e encode signal direction and type at a glance

The Buchla 200e uses a consistent color scheme for banana jacks to communicate function. Black and grey jacks are CV inputs; blue, violet, and occasionally green jacks are CV outputs. Orange jacks are pulse inputs; red jacks are pulse outputs. This color-coding lets a performer trace a patch visually without reading panel text. The scheme originates with the original Buchla 200 series and is maintained across 200e and 200h modules, with the Music Easel/208 being a noted exception for orange jacks.

Examples

A red banana jack on the 281e function generator outputs pulses (end-of-cycle triggers). Blue banana jacks on the 225e MIDI decoder output pitch CVs.

Assessment

Looking at a Buchla 200e panel photo, classify five patch points by function using jack color alone. Name the one module that is a documented exception to the orange = pulse input rule.