10.6

127Logic Pro Effects
Filter effects
Logic Pro Filter effects overview
Filters are used to emphasize or suppress frequencies in an audio signal, resulting in a
change in the tonal color of the audio.
Logic Pro contains a variety of advanced filter-based effects that you can use to creatively
modify your audio. These effects are most often used to radically alter the frequency
spectrum of a sound or mix. Several filter effects provide a Side Chain input.
Included are AutoFilter and Spectral Gate which can be used for interesting sound design
manipulations, the vocoder-based
EVOC 20 Filterbank and EVOC 20 TrackOscillator
plug-ins, and the Fuzz-Wah.
Note: Equalizers (EQs) are special types of filters. They are not usually used as “effects”
per se, but as tools to refine the frequency spectrum of a sound or mix. See Logic Pro
Equalizers overview.
AutoFilter
Logic Pro AutoFilter overview
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.