images via this auctionThis is the MS20 from this video and this video.
"For auction is one Korg MS-20 semi-modular two oscillator analog monophonic synthesizer with patch cables, power converter, and 4 channel Rolls passive mixer.
The MS-20 has diverse functionality even before you start altering the signal path with the patch cables. It is a two oscillator synthesizer with multiple waveforms including ring modulator, noise, triangle, saw, square, and adjustable width pulse. It features an osc mixer, portamento, and two types of tuning. Multiple forms of pitch modulation are included. The synthesizer has a resonant 12dB per octave low pass filter and a resonant 12 dB per octave high pass filter. Both filters have their own LFO and ENV modulation. The LFO (or modulation generator) has control for waveshape and frequency. Two envelopes are included with delay and hold.
The patch panel allows for more modulation possibilities and more inputs and outputs. It also contains a Sample and Hold module, an extra VCA, positive and negative envelopes, mod gen outputs, modulation inputs, and voltage and trigger inputs and outputs.
The MS-20 features an external signal processor which allows you to control the synthesizer with any audio input. This section allows for pitch to voltage conversion (allowing the pitch of the input to control the pitch of the MS-20), conversion of amplitude to envelope, conversion of peak to trigger, and other functions which allow the instrument to be played controlled by audio input... even your voice!
This particular MS-20 has seen some use. There is wear apparent upon it. Someone took the liberty of painting the back, sides, and bottom with what looks to be something like housepaint. There are no trim covers. The on/off pot could benefit from a pot nut!
Despite these alterations and minor shortcomings, this MS-20 is fully functional, and sounds great. All pots, jacks, lights, wheel, and button are fully functional.
The auction includes a Rolls MX41 passive mixer, which can be used to mix and adjust control voltages in ways that the MS-20 alone cannot provide. Use of this mixer opens a lot of possibility and variety in the sound of the MS-20! (see patch idea in picture below)
Also included is 10 patch cables for use with the MS-20 am MX41.
This MS-20 has European voltage, but a transformer for use in the United States is included!"
