X

Chapter 6 Filter eects 12 3
EVOC 20 Filterbank Formant Filter
The parameters in this section provide precise level and frequency control of the lters.
Bands value field
Lowest button
Formant Shift knob
High and Low
Frequency parameters
Frequency band faders
Boost A knob
Fade AB slider
Boost B knob
Highest button
Slope pop-up menu
Resonance knob
Formant Filter parameters
•
High and Low Frequency parameters: Drag to determine the lowest and highest frequencies
allowed to pass by the lter banks. Frequencies that fall outside these boundaries will be 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 elds that are below the blue bar to adjust the frequency
values separately.
•
Frequency band faders: Drag to set the level of each frequency band in lter bank A—the blue
faders—or lter 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: Rotate to move all bands in both lter 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 eld: Drag to set the number of frequency bands—up to 20—in each lter bank.
•
Lowest button: Click to switch the lowest lter band between bandpass or highpass lter
operation. In bandpass mode, the frequencies above and below the lowest band are ignored.
In highpass mode, all frequencies below the lowest band are ltered.
•
Highest button: Click to switch the highest lter band between bandpass or lowpass lter
operation. In bandpass mode, the frequencies above and below the highest band are ignored.
In lowpass mode, all frequencies above the highest band are ltered.
•
Resonance knob: Rotate to determine the basic sonic character of both lter 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.