10.6

152Logic Pro Effects
Use Logic Pro Spectral Gate
One way you can familiarize yourself with the operation of Spectral Gate is to start with a
drum loop. Set Center Freq to its minimum value (20 Hz) and Bandwidth to its 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 Freq, 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 sliders.
Get started with Spectral Gate
1. In Logic Pro, rotate the Center Frequency and Bandwidth knobs to set the frequency
band you want to process.
The graphic display shows the band that you define with these two parameters.
2. 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.
3. 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.
4. 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.
5. Drag the Speed, CF Modulation, and BW Modulation sliders to modulate the defined
frequency band.
• Use the Speed slider to determine the modulation frequency.
• Use the CF Modulation slider to define the intensity of the center
frequency modulation.
• Use the BW Modulation slider to control the amount of bandwidth modulation.
6. Drag the Gain slider to adjust the final output level of the processed signal.