Use the ES1 LFO in Logic Pro for iPad
The LFO (low frequency oscillator) generates an adjustable, cyclic waveform that you can use to modulate other ES1 parameters.

LFO parameters
Rate knob and field: Set the speed, or frequency, of the LFO waveform cycles.
If you set values to the right of 0, the LFO phase runs freely.
If you set values to the left of 0, the LFO phase is synchronized with the Logic Pro tempo—with phase lengths adjustable between 1/96 bar and 32 bars.
When set to 0, the LFO outputs at a constant, full level, which allows you to manually control the LFO speed with your keyboard modulation wheel. For example, to change the pulse width by moving your keyboard modulation wheel, choose pulse width as the LFO modulation target and set the modulation intensity range using the Int via Whl slider.
Wave pop-up menu: Set the LFO waveform. Each waveform has its own shape, providing different types of modulation.
You can choose the following waveforms: triangle; ascending and descending sawtooth; square wave; sample & hold (random); and a lagged, smoothly changing random wave.
You can also choose EXT to assign a side chain signal as a modulation source. Choose the side chain source channel strip from the Side Chain pop-up menu in the upper-right corner of ES1.
Destination pop-up menu: Choose a modulation target for the LFO.
Pitch: Modulate the pitch—the frequency—of the oscillators.
PW: Modulate the pulse width of the pulse wave.
Mix: Modulate the mix between the primary oscillator and the sub-oscillator.
Cutoff: Modulate the cutoff frequency of the filter.
Res.: Modulate the resonance of the filter.
VCA: Modulate the main volume.
Wheel Min/Max sliders and fields: Set the LFO intensity at the minimum and maximum mod wheel position. The distance between the sliders indicates the modulation wheel range.
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