AutoFilter envelope controls in Logic Pro for iPad
The envelope is used to shape the filter cutoff over time. When the input signal exceeds the set threshold level, the envelope is triggered.
Envelope parameters
On/Off button: Turn the envelope section on or off.
Threshold knob and field: Set an input level that—if exceeded—triggers the envelope or LFO that dynamically modulates filter cutoff frequency. See AutoFilter LFO controls and AutoFilter filter controls.
Note: Retriggering of the envelope or LFO occurs only if the Retrigger button is active.
Env Dynamic knob and field: Determine the input signal modulation amount. You can modulate the peak value of the envelope section by varying this control.
Side Chain Link button: Turn on to use a side chain as the control signal for the envelope. You choose the side chain source channel strip from the Side Chain pop-up menu in the plug-in menu bar.
Attack slider and field: Set the envelope attack time.
Decay slider and field: Set the envelope decay time.
Sustain slider and field: Set the envelope sustain level. If the input signal falls below the threshold level before the envelope sustain phase, the release phase is triggered.
Release slider and field: Set the envelope release time. This is triggered as soon as the input signal falls below the threshold.
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