3.5

Table Of Contents
136MainStage Effects
The EVOC20 Filterbank interface is divided into three main sections:the Formant Filter
parameters section in the center of the window, the Modulation parameters section at the
bottom, and the Output parameters section along the right side.
Formant Filter parameters: Control the frequency bands in the two filter banks—the
upper, blue, filter bank A and the lower, green, filter bank B. See MainStage EVOC20
Filterbank Formant Filter.
Modulation parameters: Control how Formant Filter parameters are modulated. See
MainStage EVOC20 Filterbank modulation.
Output parameters: Control the overall output level and panning of the EVOC20
Filterbank. See MainStage EVOC20 Filterbank output controls.
A short introduction to formants
A formant is a peak in the frequency spectrum of a sound. In the context of human voices,
formants are the key component that enables humans to distinguish between different
vowel sounds, based purely on the frequency of these sounds. Formants in human speech
and singing are produced by the vocal tract, with most vowel sounds containing four or
more formants.