MS-20

Korg MS-20

Released: 1978

MSRP: Y98,000 ($850US)

Synopsis:

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.

Physical

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)

Interface

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

Architecture

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

Output

Effects	Pan Modulator	Volume Modulator	Headphone
no	no	external EG2	no

Control

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

Keyboard

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

Source

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

Filter

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

Envelope

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

LFO

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

Conventional Models

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