Operator is a frequency modulation synthesizer with 4 oscillators with individually assignable waveforms.
Through the use of modulators with frequencies that are non-integer multiples of the carrier signal (i.e. non harmonic), atonal and tonal bell-like and percussive sounds can easily be created.
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Don Buchla implemented FM on his instruments in the mid-1960s, prior to Yamaha's patent.
Ultra high frequency | Frequency modulation | frequency | High frequency | Very high frequency | Chemical synthesis | frequency modulation | Extremely high frequency | synthesis | Radio-frequency identification | Pulse-width modulation | modulation | Medium frequency | Frequency | Cambridge Low Frequency Synthesis Telescope | ultra high frequency | Super high frequency | Single-sideband modulation | low frequency | Frequency Modulation | Frequency-division multiplexing | FreQuency | chemical synthesis | Amplitude modulation | Williamson ether synthesis | wave field synthesis | Utility frequency | Orthogonal frequency-division multiple access | Nyquist frequency | modulation (music) |