The Korg Poly-61 is an analog synthesizer launched as a successor to the Polysix. It featured two oscillators per voice, and was Korg's first synthesizer with digitally-controlled analog oscillators (DCOs). In 1984, an updated version, the Poly-61M, was released to incorporate support for the newly established Musical Instrument Digital Interface (MIDI) standard.
The Poly-61 is offering 64 programmable memories and also featured two banks of oscillators, allowing for interval and detuning effects. It features two digitally controlled analog oscillators (DCOs) per voice. DCO1 delivers sawtooth, square, and pulse-width modulation (PWM) waveforms. DCO2 generates sawtooth and square waveforms and can be slightly detuned from DCO1. The VCF includes controls for cutoff frequency, resonance, keyboard tracking, and envelope modulation. The audio signal path passes through a VCA, which can controlled via an ADSR envelope generator or an external CV/gate pulse. The LFO produces a triangle wave, featuring a variable delay, and can modulate the DCOs and the VCF. The Poly-61 also features an arpeggiator and a chord memory function capable of capturing up to six notes. (Source: Wikipedia)
