Microfreak/UG/06 Dig Osc/03 Types/08 Two Op.FM

• 06.03.08 Two operator FM (Two Op.FM)

  • Two operator Oscillator Model
    • 
  • Description: FM synthesis began with Dr. John Chowning's work at Stanford University in the late 1960s. The first FM synthesizer ran on a mainframe computer—roughly a room full of refrigerators.
  • Chowning found that modulating a waveform with others tuned to the harmonic series could emulate many acoustic instruments. Inharmonic relationships produced bell-like tones and other intricate sounds that were difficult for analog synthesizers of the time to reproduce.
  • This oscillator uses two sine-wave oscillators, each modulating the phase of the other, to create a wide range of sounds.
  • Ratio: Sets the frequency ratio between the oscillators.
  • Amount: Sets the modulation index.
  • Shape: Sets feedback, with operator 2 modulating its own phase.