EVOC 20 PS oscillators overview in Logic Pro for Mac

You can switch EVOC 20 PS oscillators between dual mode and FM mode. The Synthesis section also incorporates a noise generator that can add a further color to your sound.

Figure. Oscillator parameters.
  • Dual mode: Each oscillator allows you to choose a digital waveform.

  • FM mode: Oscillator 1 generates a sine wave. The frequency, or pitch, of oscillator 1 is modulated by oscillator 2. This leads to a number of different tones and harmonics becoming audible. Oscillator 2 can use any available digital waveform. See Frequency modulation (FM) synthesis).

    Each mode subtly changes the parameters shown in the oscillator section.

Both Dual and FM mode provide the following common parameters.

Common oscillator parameters

  • 16’, 8’, 4’ value buttons: Set the octave range for oscillator 1. 16’ (16 feet) is the lowest, and 4’ the highest setting. The use of the term feet to determine octaves comes from the measurements of organ pipe lengths. The longer and wider the pipe, the deeper the tone.

  • Wave 1 and Wave 2 fields: Choose the waveform type for oscillators 1 and 2. There are 50 single-cycle digital waveforms with different sonic characteristics.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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