While most modular systems contain different types of filters many tend to omit the percussion sound sculpting tool, the Fixed Filter Bank. The reference standard for Fixed Filter Banks is the 914 module by Moog and while this module is both expensive and difficult to obtain the Yusynth Fixed Filter Bank is an outstanding option based on the same sonic principals.
The FFB makes it possible to greatly enrich the sonic palette of a modular system. It is also a key element for the recreation of “natural” and environmental sounds, or of conventional music instruments. Although it evokes the principle of a mere graphic equalizer, it has marked differences. Mainly, the filter Q is higher and the BP slopes are steeper than in a graphic EQ. Furthermore when a control is set to zero, the corresponding spectral band is completely muted.
Complex/entangled rhythms can be created on the fly by multi-band filtering a simple sequence.
This module has twelve fixed band-pass filters with -12dB/octave slopes, a low-pass filter and a high-pass filter with -24db/octave slopes. All the filters are resonant with a Q coefficient around 3.7. The gain of each filter is adjustable from completely silent to maximum.
Two inputs (with different gain levels) are provided as well as three outputs: a main output with all filter cells mixed, an ouput with only odd cells and the third output with only even cells. These separate outputs make it possible to use the FFB for creating pseudo-stereo sounds (spacialization).
The Fixed Filter Bank comes in a 4U width with 1″ (25.4mm) knobs controlling 14 potentiometers for modification of each frequency.
The module operates at +/- 15V and comes with a Synthesizers.com style power connector.
- Level 1: $360
- Level 2: $350
- Level 3: $340