ES2 oscillator parameters in Logic Pro for iPad

ES2 oscillators are used to generate one or more waveforms. This signal is then sent to other portions of the synthesizer engine for shaping, processing, or manipulation.

  • Oscillators 2 and 3 are almost identical to each other, but they differ from oscillator 1.

  • Oscillator 1 can be frequency modulated by oscillator 2, for FM synthesis sounds.

  • Oscillators 2 and 3 can be synchronized to, or ring modulated with, oscillator 1. These oscillators also have rectangular waves with either user-defined fixed pulse widths or pulse width modulation (PWM) features.

  • You can use multiple Mod Matrix slots to simultaneously change the pulse widths of rectangular waves generated by oscillator 1 and the synchronized and ring-modulated rectangular waves of oscillators 2 and 3.

Tap the Main button to view and adjust these ES2 parameters.

Figure. ES2 Oscillator section.

Oscillator parameters

  • Oscillator On/Off buttons: Tap to independently turn on or turn off oscillator 1, 2, or 3. Deactivating an oscillator saves computer processing power.

  • Semitone knobs and fields: Set the oscillator pitch, in semitone steps, over a range of ±3 octaves. Because an octave consists of 12 semitones, the ±12, 24, and 36 settings represent octaves.

  • Detune knobs and fields: Fine-tune the oscillator frequency (pitch) in cents. One cent is 1/100th of a semitone.

  • Waveform knobs and fields: Choose the waveform that an oscillator generates. The waveform is responsible for the basic tonal color. See ES2 basic oscillator waveforms.

    In addition to basic synthesizer waveforms, all ES2 oscillators provide 100 additional waveforms called Digiwaves. These are very short samples of the attack transients of various sounds and instruments.

  • Digiwave sliders and fields: Drag to choose a Digiwave or tap the Digiwave field, then type a value.

    Important: The Waveform knob of the oscillator must be set to the zero position in order to choose a Digiwave. All other Waveform knob positions turn off the Digiwave slider.

  • Oscillator Mix pad: Move the gray dot in the Oscillator Mix pad to crossfade (set the level relationships) among the three oscillators. See Balance ES2 oscillator levels.

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