Poly-61 Programmable Polyphonic Synthesizer © 1982 Korg
The Korg Poly-61 was a 6-voice analog polyphonic synthesizer and the successor to the Korg Polysix. Developed by Korg, it used digitally controlled oscillators (DCOs) combined with analog filters and amplifiers, offering a more stable tuning system compared to earlier fully analog designs. It introduced a matrix-style parameter programming interface instead of traditional knobs, making it more compact but less immediate to edit in real time.
The Poly-61 was Korg’s response to the growing demand for more affordable and compact polyphonic synthesizers in the early 1980s.
It features 6-voice polyphony, each voice using a single DCO (digitally controlled oscillator) paired with analog filtering.
It replaced the knob-heavy interface of the Polysix with a button + parameter matrix system, reducing manufacturing cost but making programming less intuitive.
It includes a built-in analog chorus ensemble effect, derived from the Polysix’s famous effect section (though more simplified).
It offers 2 DCO waveforms (saw and pulse) with PWM (pulse width modulation) for richer tones.
It does not include MIDI on early units; MIDI was added later via retrofit (KLM-780 board in many cases).
Compared to the Polysix, it is often considered less lush but more stable and maintenance-friendly due to DCO architecture.
It became popular in the mid-1980s for pop, synth-pop, and film scoring textures, especially pads and brass sounds.
Its design philosophy prioritizes cost reduction and reliability over hands-on sound design immediacy.
It is part of Korg’s transitional phase between fully analog synths and later digital/PCM instruments like the DW and M1 series.