The synth offers a 37-note slim-key keyboard with monophonic or duophonic operation. The oscillator section includes two VCOs with sawtooth, square, and pulse waveforms. Additionally, all three revisions of the filter are immediately accessible via switch and further broaden the tonal palette.

The opsix is an “altered” six-operator FM synthesizer. With its astoundingly accessible operator mixer and flexible sound engine that goes well beyond traditional FM, this instrument widens the potential of digital synthesizers to their utmost.