Overview
The Korg Sigma, released in 1979, was a preset synthesizer offering simple operation and distinctive sounds. This bi-timbral instrument provided two separate synthesizer sections—one optimized for bass sounds, the other for leads—that could be played independently or layered. The Sigma targeted musicians seeking synthesizer sounds without programming complexity.
The instrument featured aftertouch sensitivity and a comprehensive set of performance controls. The 37-key keyboard and intuitive interface made it accessible to beginners. The Sigma's sounds, while presets, offered character that distinguished it from competitors.
Korg manufactured the Sigma through the early 1980s before the market shifted toward fully programmable instruments. The Sigma represents an interesting chapter in Korg's synthesizer development, demonstrating different approaches to making synthesis accessible.