EVOC 20 PS oscillators in Logic Pro for iPad
You can switch EVOC 20 PS oscillators between dual mode and FM mode. These operating modes change both the behavior and sound of the synthesis engine. An integrated noise generator can be used to add a further color to your sound.
The EVOC 20 PS Synthesizer section also incorporates a lowpass filter, an envelope, and a dedicated pitch modulation (vibrato) LFO.
Main oscillator parameters
Osc 1/2 Wave knobs and fields: Choose the waveform type for oscillators 1 and 2. There are 50 single-cycle digital waveforms with different sonic characteristics.
Osc1 Octave 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.
Synthesis buttons: Choose the synthesis mode.
Dual mode: Each oscillator allows you to choose a digital waveform. See EVOC 20 PS oscillator dual mode.
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 EVOC 20 PS oscillator FM mode and Frequency modulation (FM) synthesis).
Each mode changes the parameters shown in the Synthesizer section.
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