Use Spectral Gate in Logic Pro for iPad
One way you can familiarize yourself with the operation of Spectral Gate is to start with a drum loop. Set Center Frequency to the minimum value (20 Hz) and Bandwidth to the maximum value (20,000 Hz) to process the entire frequency range. Turn up the Super Energy and Sub Energy knobs, one at a time, and then try different Threshold settings to get a sense of how different Threshold levels affect the sound of Super Energy and Sub Energy. When you have obtained a sound that you like or consider useful, narrow the Bandwidth parameter drastically, gradually increase Center Frequency, and then use the Low Level and High Level sliders to mix in some treble and bass from the original signal. At lower Speed settings, turn up the CF Modulation or BW Modulation knobs.
Get started with Spectral Gate
In Logic Pro, rotate the Center Frequency and Bandwidth knobs to set the frequency band you want to process.
Drag the Threshold slider to set the appropriate level.
All incoming signals above and below the threshold level are divided into upper and lower frequency ranges.
Rotate the Super Energy knob to control the level of the frequencies above the threshold, and rotate the Sub Energy knob to control the level of the frequencies below the threshold.
Drag the Low Level slider and the High Level slider to mix the frequencies that fall outside the defined frequency band with the processed signal.
Use the Low Level slider to blend the frequencies below the defined frequency band with the processed signal.
Use the High Level slider to blend frequencies above the defined frequency band with the processed signal.
Use the Speed, CF Modulation, and BW Modulation knobs to modulate the defined frequency band.
Use the Speed knob to determine the modulation frequency.
Use the CF Modulation knob to define the intensity of the center frequency modulation.
Use the BW Modulation knob to control the amount of bandwidth modulation.
Use the Gain knob to adjust the final output level of the processed signal.
Download this guide: PDF