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Korg MS-20


Released: 1978

MSRP: Y98,000 ($850US)


The MS-20 adds a second VCO with ring modulation, HPF, S/H, and a second EG, similar to a monophonic PS3200. Architecture Class: Conventional (subtractive).

Ebay Description:

The Korg MS-20 is a 37 key (monophonic) synthesizer, featuring dual oscillators (triangle, saw, square, pulse waveforms), noise, resonant high and low pass analog filters, dedicated DAR pitch and HADR filter/amp envelopes, LFO (triangle, saw up/down, square, pulse waveforms routed to pitch and filters), and patch points.


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
37 keys W:569mm D:309mm H:249mm 7.7kg filter mono no EG1 EG2 filter MG MVCA pitch:2 PWM S/H trigger VCA wheel CV EG1:3 EG2:3 Ext:3 MG MVCA noise:2 S/H trigger no AC:wired (10W)


Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- N/A no no no knobs switches LED


Multitimbral Polyphony Unison Architecture
no 1 no VCO1->VCO2->HPF->LPF->VCA


Effects Pan Modulator Volume Modulator Headphone
no no external EG2 no


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A ControlWheel no


Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no patch points no no N/A


Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
VCO1 analog triangle saw square pulse 4 8 16 32 no PWM ring external MG no
VCO2 analog triangle square pulse 2 4 8 16 no PWM ring external EG1 no
Noise analog noise:pink noise:white - no no no no


Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
HPF analog discrete yes high pass external MG EG2 no no
LPF analog discrete yes low pass external MG EG2 no no


Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
EG1 - delay attack release no no no no no
EG2 sustain hold attack decay release no no no no no


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
MG triangle saw:up saw:down square pulse:2 no no no no no no
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MicroPreset M-500 MicroPreset M-500SP PS-3100 PS-3200 PS-3300 MS-10 MS-20 MS-50
X-911 Delta Lambda Sigma Trident Trident MKII MonoPoly Polysix
Poly-61 Poly-61M Poly-800 EX-800 Poly-800II