What it is and what it was built for
It is a 1977 polyphonic analog synthesizer built from three integrated PS-3100-derived units (PSU-3301), designed as a high-end, professional, patchable instrument — not for hobbyists but for studios and composers needing massive, configurable analog polyphony.
How it works, in terms a player would use
It runs three identical PSU-3301 units in parallel, each with its own VCO offering triangle, pulse, square, PWM, and sawtooth waveforms. Each note triggers all 144 voices at once. Pitch modulation comes from an LFO or via patch panel sockets that accept envelope or external voltage sources. The three modules are mixed post-adjustment for multitimbral output.
What it does better than anything else
It delivers 144 simultaneous analog voices with independent oscillators, filters, envelopes, and amplifiers per note — more than any other 1977 analog synth. Its three-module architecture allows true multitimbral sound design where each voice stack can be tuned, filtered, and shaped separately before mixing.
What it does badly
It does badly anything requiring portability, immediacy, or built-in effects. It omits the PS-3100’s ensemble effect. It has no keyboard integrated — only a detachable one. It offers no memory, no MIDI, no velocity or aftertouch sensing. Its multitimbrality requires manual module balancing and patching, not layer selection.
What people made with it
The sources do not state what people made with it.
Who should use it, and who should not
A studio owner or sound designer who needs dense, hands-on, voltage-controllable polyphony and already owns or can source a compatible keyboard and patch cables should use it. Anyone needing quick recall, compact size, built-in effects, or modern integration should not.
Is it worth your time
It is worth your time only if you need raw, unfiltered polyphonic analog density and have space, budget, and patience for a non-keyboard, fully patchable system. It offers no shortcuts, no presets, no ensemble effect — just three PS-3100s wired together, demanding hands-on control for every voice.
