User Guide

Chapter 6 Filter 105
 Formant Shift knob: Moves the position of all bands in both filter banks up or down
the frequency range. You can jump directly to the values –0.5, –1, 0, +0.5 or +1.0 by
clicking one of these numbers on the edge of the knob.
 Bands value field: Sets the number of frequency bands in each filter bank. The range
is from 5 to 20 bands.
Note: Increasing the number of bands also increases the CPU overhead.
 Lowest button: Sets whether the lowest band of each filter bank acts as a lowpass or
bandpass filter.
 Resonance knob: Controls the basic sonic character of both filter banks. Increasing
the Resonance emphasizes the middle frequency of each band. Low settings give a
softer character, while high settings give a sharper character.
 Boost A knob: Sets the amount of boost (or cut) applied to the frequency bands in
Filter Bank A. The range is ±20 dB. This allows you to compensate for the reduction in
volume caused by lowering the level of one or more bands.
Boost is also quite handy to adjust the levels of both filter banks to each other, so
that using Fade A/B (see below) leads only to a sound color change, but not to a
level change.
 Highest button: Sets whether the highest band of each filter bank acts as a highpass
or bandpass filter.
 Slope pop-up menu: Sets the amount of filter slope applied to all filters of both filter
banks. Choices are 1 (filter attenuation of 6 dB/Oct.) and 2 (filter attenuation of 12 dB/
Oct.). 1 sounds softer, 2 sounds tighter.
 Boost B knob: Sets the amount of boost (or cut) applied to the frequency bands in
Filter Bank B. The range is ±20 dB. This allows you to compensate for the reduction in
volume caused by lowering the level of one or more bands.
 Fade AB slider: Crossfades between Filter Bank A and Filter Bank B. At the top position
(0%), only Bank A is audible, while at the bottom position (100%), only Bank B is
audible. In the middle position (50%), the banks are evenly mixed.
Modulation Section
The parameters in this section control the LFOs that modulate the Formant Shift and
Fade A/B parameters in the Formant Filter section, respectively. The LFO Shift
parameters on the left modulate the Formant Shift parameter of the filter bands, and
the LFO Fade parameters on the right modulate the Fade AB parameter.