What it is and what it was built for
An analog semi-modular synthesizer released in 1975. Built as an expandable two-oscillator monosynth with sequencing, monitoring, and effects. Designed for hands-on sound design via patch-cable reconfiguration of a fixed internal signal path.
How it works, in terms a player would use
Each unit—101, 102, 103, 104, 109—is independently powered and front-panel patchable. The 101 provides keyboard, oscillator, filter, ADSR, and attenuator. The 102 duplicates those functions without a keyboard and adds ring mod and sample-and-hold. Patch cables override the fixed internal signal path. It uses 1V/oct control.
What it does better than anything else
It delivers stable pitch under complex patching thanks to independent power per unit. It gives immediate tactile access to core synthesis functions across physically separate, purpose-built modules—no menu diving, no virtual layers.
What it does badly
It cannot play chords. It offers no memory for patches. Its fixed internal routing limits flexibility compared to fully modular systems. There is no built-in LFO beyond what the sample-and-hold and ring mod provide.
What people made with it
The sources do not state what people made with it.
Who should use it, and who should not
Use it if you value discrete, stable analog units, physical patching, and monophonic sound design with sequencer and effects integration. Do not use it if you rely on presets, polyphony, or compact all-in-one form factors.
Is it worth your time
Yes—if you want hands-on semi-modular monosynth architecture with expandable two-oscillator voice design, sequencing, and effects in discrete, stable hardware units. No—if you need polyphony, preset recall, or integrated modulation routing.
