Spectral Gate in Logic Pro for iPad

Spectral Gate is an unusual filter effect that can be used as a tool for creative sound design.

It works by dividing the incoming signal into two frequency ranges—above and below a central frequency band that you specify with the Center Freq and Bandwidth parameters. The signal ranges above and below the defined band can be individually processed with the Low Level and High Level parameters and the Super Energy and Sub Energy parameters.

To add Spectral Gate to your project, choose Filter > Spectral Gate 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.

Spectral Gate parameters

Threshold control and field: Set the threshold level that is used to divide frequency ranges. When the threshold is exceeded, the frequency band defined by the Center Freq and Bandwidth parameters is divided into upper and lower frequency ranges.
Center Frequency knob and field: Set the center frequency of the band you want to process.
Bandwidth knob and field: Set the width of the frequency band you want to process.
Speed knob and field: Set the modulation frequency for the defined frequency band.
CF Modulation knob and field: Set the intensity of center frequency modulation.
BW Modulation knob and field: Set the amount of bandwidth modulation.
Low Level slider and field: Mix the frequencies of the original signal—below the selected frequency band—with the processed signal.
Sub Energy knob and field: Set the level of the frequency range below the threshold.
Super Energy knob and field: Set the level of the frequency range above the threshold.
High Level slider and field: Mix the frequencies of the original signal—above the selected frequency band—with the processed signal.
Gain knob and field: Set the overall output level.

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Logic Pro User Guide for iPad

Spectral Gate in Logic Pro for iPad

Spectral Gate parameters