User Guide

Renaissance Channel / User Guide
12
BELL FILTERS (PARAMETRIC)
Bell filters are used to boost or cut at specified frequencies, and the Q value sets the bandwidth. Usually, bell filters
have symmetrical response characteristics: effective gain is the same when boosting or cutting a band. But this
behavior doesn’t always reflect the way that people use filters.
When we use an equalizer to boost (top image), it’s usually for tonal correction or
“shaping.” When cutting (bottom), it’s usually for removing bothersome noises or
artifacts.
A bell filter with negative gain sounds sharper than the same bell filter with a
positive gain. This is equivalent to a higher Q on a symmetrical bell
equalizer, roughly double the Q of its value.