AutoFilter in Logic Pro for iPad

AutoFilter is a versatile filter effect with several unique features. You can use it to create classic, analog-style synthesizer effects, or as a tool for creative sound design.

The effect works by analyzing incoming signal levels through use of a threshold parameter. Any signal level that exceeds the threshold is used as a trigger for a synthesizer-style ADSR envelope or an LFO (low frequency oscillator). These control sources are used to dynamically modulate the filter cutoff.

AutoFilter lets you choose between different filter types and slopes, control the amount of resonance, add distortion for more aggressive sounds, and mix the original, dry signal with the processed signal.

To add AutoFilter to your project, choose Filter > AutoFilter in a channel strip Audio Effect plug-in menu or the Plug-ins area. See Intro to plug-ins. Also see Add, replace, reorder, and remove plug-ins in the Plug-ins area and Work with plug-ins in the Mixer.

AutoFilter is divided into Filter, Envelope, Distortion, LFO, and Output parameter sections.

Filter parameters: Control the tonal color of the filtered sound. See AutoFilter filter controls.
Distortion parameters: Distort the signal both before and after the filter. See AutoFilter distortion.
Envelope parameters: Define how the filter cutoff frequency is modulated over time. See AutoFilter envelope controls.
LFO parameters: Define how the filter cutoff frequency is modulated by the LFO. See AutoFilter LFO controls.
Output parameters: Set the level of both the dry and effect signal. See AutoFilter output controls.

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Logic Pro User Guide for iPad

AutoFilter in Logic Pro for iPad