Korg Sigma 1979

Sorry to see this cool weird synth go but I need the space and funds. It has been calibrated and cleaned up, only issues are that show some cosmetic signs of its age.

The pitch bend joystick displays some odd behaviour, it works well except the pitch up only bends about a semitone where the bend down goes much further. I'm pricing it competitively to reflect the issue, actually it might be normal, I’m not 100% but I like to be clear of the condition.

Other than this issue it sounds awesome and works well 😃

Local pickup would be much preferred but shipping can be discussed.

Here's some info from Vintage Synth Explorer

The Sigma is an interesting bi-timbric synthesizer consisting of two sections: a genuine analog "Synthe" and a Preset "Instrument" section. All together, there are 19 presets on it that give a variety of sounds. There are 11 presets for the "Instrument" section which include fuzz guitar, electric bass, clavi, string, flute, double reed, trumpet, hammered percussion, etc. And there are 8 presets for the "Synthe" section that give variable waveforms (square, pulse, sawtooth) in different pitch ranges (from 32' to 4'). Each preset has its own rotary control to vary its sounds. The Sigma is also unique for its ability to combine the synth and instrument sections for a nicer, layered synth sound or effect. While the synth section is nice, the instrumental sounds (tuba, trumpet, strings, guitar, etc.) are pretty darn bad, and only get interesting when mixed with the "Synthe" section sounds.

Cool joysticks add multi-dimensional control. Use one to control pitch, noise and vibrato and use the second joystick to edit the low-pass and hi-pass voltage controlled filters! There is also an "Effect" section which is for Vibrato, Portamento, Sample and Hold, Noise, Key Hold, Multiple Trigger and Ring Modulator (each with it's own rotary control to vary it's sound). Even though it has a switch labelled "Ring Mod," it's actually a cross-mod. It lets you cross modulate between the instrument and Synth sections.