Uploaded March 2021 | Updated September 2026, 2 weeks ago

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A look at the Korg Σ (Sigma / KP-30) from 1979, a rare and strange monophonic performance synthesizer with two joysticks.

We discuss its features and history and listen to its suprising sound.

Gear used:
Korg Σ (1979)
Korg MS-20 Mk I (1978)
Korg KR-55B (1982)
Korg KPR-77 Samples (1983)
Korg DDM-110 (1985)
Korg SQ-1 (2015)
Seekers Voice Spectra Vocoder (00s)
Squier Jagmaster Vista (1997)
Evans Sound Creator Nova 400 (70s)

If you enjoyed the music and/or wanted to support me in making future videos then the outro song from this video can be bought here: alexball.bandcamp.com/track/korg-sigma-sun-stars

Thanks

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0:00 Opening Jam
1:02 The Korg Sigma
1:53 Demo 1: The Joy of Sticks
2:30 Demo 2: Your Host This Evening
2:49 The Tone Sections
3:49 Demo 3: XXX
4:30 Demo 4: Klang!
5:01 Effects
7:31 Context & Summary
8:16 Contextual Demonstration