Ableton/Live/UG/31 Instrument Reference/09 Operator/09 Finally
- Operator comes from a love of hardware FM synths such as the Yamaha SY77, the Yamaha TX81Z and the NED Synclavier II.
- John Chowning first explored FM musically in the mid-1960s. In 1973 he and Stanford began working with Yamaha, which led to the DX7.