10.6

134Logic Pro Effects
Logic Pro EVOC 20 Filterbank Formant Filter
The parameters in this section provide precise level and frequency control of the filters.
Formant Filter parameters
• High and Low Frequency parameters: Determine the lowest and highest frequencies
allowed to pass by the filter banks. Frequencies that fall outside these boundaries
are cut.
• The length of the horizontal blue bar at the top represents the frequency range. The
silver handles on the left and right ends of the blue bar set the Low Frequency and
High Frequency values, respectively. You can move the entire frequency range by
dragging the blue bar.
• You can also drag in the numeric fields that are below the blue bar to adjust the
frequency values separately.
• Frequency band faders: Set the level of each frequency band in filter bank A—the blue
faders—or filter bank B—the green faders. You can quickly create complex level curves
by dragging horizontally, or “drawing,” across either row of faders.
• Formant Shift knob: Move all bands in both filter banks up or down the
frequency spectrum.
Note: The use of Formant Shift can result in the generation of unusual resonant
frequencies when high Resonance settings are used.
• Bands value field: Set the number of frequency bands—up to 20—in each filter bank.
• Lowest button: Switch the lowest filter band between bandpass or highpass mode.
In bandpass mode, the frequencies above and below the lowest band are ignored.
In highpass mode, all frequencies below the lowest band are filtered.
• Highest button: Switch the highest filter band between bandpass or lowpass mode.
In bandpass mode, the frequencies above and below the highest band are ignored.
In lowpass mode, all frequencies above the highest band are filtered.
• Resonance knob: Determine the basic sonic character of both filter banks. High
Resonance settings emphasize the center frequency of each band and result in
a sharper, brighter character. Low settings result in a softer character.