Used Korg MS-20 Mini Monophonic Analog Synthesizer, 2 Oscillators, 37 Mini-Keys

37-note mini keyboard

Monophonic

No

Voltage controlled analog

Voltage Controlled Oscillator 1 (VCO 1)
Scale: 32, 16, 8, 4' (6 octaves, +cent, -cent)
Waveform: Triangle, Sawtooth, PW-Square, White Noise, (x 4 modes)
Pulse Width Adjust: 1:1 to 1:Infinity
Voltage Controlled Oscillator 2 (VCO 2)
Scale: 16, 8, 4, 2' (6 octaves, +cent, -cent)
Waveform: Sawtooth, Square, Pulse, Ring Modulator, (x 4 modes)
Pitch: +/-1 Octave
VCO Master Control
Master Tune: +/- 100 cents

Portamento: Maximum 10 s
Frequency Modulation Intensity by MG/T.EXT: -5V to +5V
Frequency Modulation Intensity by EG1/EXT: -5V to 0V
VCO Mixer
VCO 1 Level
VCO 2 Level
Voltage Controlled High Pass Filter (VCF HPF)
Cutoff Frequency: 50 Hz to 15 kHz
Peak: Flat to self OSC
Cutoff Frequency Modulation Intensity by MG/T.EXT: -5V to +5V
Cutoff Frequency Modulation Intensity by EG2/EXT: -5V to +5V

Voltage Controlled Low Pass Filter (VCF LPF)
Cutoff Frequency: 50 Hz to 15 kHz
Peak: Flat to self OSC
Cutoff Frequency Modulation Intensity by MG/T.EXT: -5V to +5V
Cutoff Frequency Modulation Intensity by EG2/EXT: -5V to +5V
Envelope Generator 1
Delay Time: 10 s
Attack Time: 10 s
Release Time: 10 s
Envelope Generator 2
Hold Time: 20 s
Attack Time: 10 s
Decay Time: 10 s
Sustain Time: 10 s
Release Time: 10 s
Modulation Generator (LFO)

Waveform: Positive Sawtooth - Triangle - Negative Sawtooth, Wide Pulse - Square - Narrow Pulse
Frequency: 0.1 Hz to 20 Hz
Manual Controller
Control Wheel (center click)
Momentary Switch --> Ground
Power switch and Volume
Volume
Indicators
Keyboard Trigger LED
Modulation Generator Rate LED
Power On LED

Control Section
Input Signal Level
Low Cut Frequency: 50 Hz to 2.5 kHz
High Cut Frequency: 100 Hz to 5 kHz
CV Adjust
Threshold Level
Input and Output
Signal In
Amplifier Out
Band Pass Filter Out
CV Out: 0 to +8.4V
ENV Out: 0 to +5V
Trig Out: +5V --> Ground

Indicators
Peak Indicator LED
Trigger Indicator LED
Control Section
Input Signal Level
Low Cut Frequency: 50 Hz to 2.5 kHz vHigh Cut Frequency: 100 Hz to 5 kHz
CV Adjust
Threshold Level
Input and Output
Signal In
Amplifier Out
Band Pass Filter Out
CV Out: 0 to +8.4V
ENV Out: 0 to +5V
Trig Out: +5V --> Ground
Indicators
Peak Indicator LED
Trigger Indicator LED

Keyboard
Keyboard Control Voltage Output (Exponential): 0 to +8V
Keyboard Trigger Output: +5V --> Ground
VCO-1 + VCO-2 Control Voltage Input (Linear Response): 0 - +8V
VCO-2 Control Voltage Input (Linear Response): 0 - +8V
VCO
VCO-1 + VCO-2 External Frequency Control Input (Oct/V): -5V to +5V
VCF
External Signal Input: 3Vp-p maximum
External High Pass Filter Cutoff Frequency Control Input (2 Oct/V): -5V to +5V

External Low Pass Filter Cutoff Frequency Control Input (2 Oct/V): -5V to +5V
VCO + VCF
Total External Modulation Input (T.EX): -5V to +5V
VCA
External Initial Gain Control Input: 0 to +5V
EG
EG 1 Envelope Signal Normal Output: -5V to 0V
EG 1 Envelope Signal Reverse Output: +5V to 0V
EG 1 + EG 2 Trigger Input: --> Ground
EG 1 Trigger Input: --> Ground
EG 2 Envelope Signal Reverse Output: +5V to 0V
MG

Triangle Output: Positive Sawtooth - Triangle - Negative Sawtooth (5Vp-p)
Rectangle Output: Wide Pulse - Square - Narrow Pulse (0 to +5V)
Noise Generator
Pink Noise Output: 5Vp-p
White Noise Output: 5Vp-p
Sample and Hold
Clock Trigger Input: --> Ground

Sample Signal Input: 5Vp-p maximum
S/H Output: 5Vp-p maximum
Modulation VCA
Control Voltage Input: 0 to +5V)
Signal Input: -5V to +5V
Signal Output: -5V to +5V
Manual controller
Control Wheel Output: -5V <-- 0V --> +5V
Momentary Switch Output: --> Ground

1 x 1/8" (3.5 mm) TS mono mini Signal Output (2Vp-p, output impedance 3.5kohm)
1 x 1/8" (3.5 mm) TS mono mini External Signal Input
1 x 1/8" (3.5 mm) TRS stereo mini Headphone
1 x 5-pin DIN MIDI In
1 x USB Type B

9V DC via included external power supply
9W consumption

19.4x10.1x8.2" / 49.27x25.65x25.65 cm

10.6 lbs / 4.80 kg