Use the ES1 modulation envelope in Logic Pro for iPad

The modulation envelope can directly modulate a chosen parameter. It controls the time it takes for the modulation to fade in or fade out. At its center position (Off), modulation intensity is static—no fade-in or fade-out occurs. When set to its full value, modulation intensity is at a constant level.

The modulation envelope allows you to set either a percussive type of decay envelope by choosing low values or an attack type of envelope by choosing high values.

Modulation envelope parameters

Time slider and field: Set a fade-in (attack) or fade-out (decay) time for the modulation. Drag upward to set a fade-in. Drag downward to set a fade-out. When set to the center position (Off), the modulation envelope fade is disabled.
Destination pop-up menu: Choose a modulation target for the modulation envelope.
- 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.
- FM: Use the triangle waveform to modulate filter cutoff frequency. This modulation can result in a pseudo-distortion of the sound, or it can create metallic, FM-style sounds. The latter occurs when the only signal you can hear is the self-oscillation of the resonating filter.
- LFO: Modulate the overall amount of LFO modulation.
Vel Min/Max sliders and fields: Set the upper modulation envelope limit for the hardest keystrike (velocity=127) with the Max slider. The Min slider sets the lower limit for the softest keystrike (velocity=1). The distance between the sliders indicates the range of velocity values that alter the intensity of the modulation envelope.

Modulate a parameter with velocity

In Logic Pro, select a modulation target, such as PW (Pulse Width), from the Destination pop-up menu.
Set the Time slider to the center (Off) position, and adjust the Vel Min/Max sliders as needed.
This results in a velocity-sensitive modulation of the oscillator pulse width.
More interestingly, you can directly control the LFO level if you choose LFO in the Destination pop-up menu.

Fade the LFO modulation in or out

In Logic Pro, drag the Time slider upward to fade in the LFO modulation. The higher the value, the longer it takes for you to hear the modulation.
Drag the Time slider downward to fade out the LFO modulation. The lower the value, the shorter the fade-out time is.
LFO control with envelopes is most often used for delayed vibrato, a technique many instrumentalists and singers employ to intonate longer notes.

Set up a delayed vibrato

In Logic Pro, drag the Time slider upward.
Select Pitch as the LFO target in the Destination pop-up menu.
In the LFO section, use the Wave knob to select the triangular wave as the LFO waveform.
Set the (LFO) Rate knob to a rate of about 5 Hz.
Set the (LFO) Wheel Max slider to a low value, and the (LFO) Wheel Min slider to zero.

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Logic Pro User Guide for iPad

Use the ES1 modulation envelope in Logic Pro for iPad

Modulation envelope parameters

Modulate a parameter with velocity

Fade the LFO modulation in or out

Set up a delayed vibrato