Much like CORVEX and ECOX, FILTOX is also a "modulation effect". Here though, everything relates to frequency response deflection: a modulation source controls two filter units. Possible areas of application are synthesizer sounds (filter sweeps on pads) or creative distortions of drumloops (e.g. for variations, fills, etc). With guitars you can create typical 'wah' effects: either by tempo modulation or in a special mode, modulation via the signal envelope curve.

The 'core' of FILTOX is a stereo multimode filter based on an analogue model (Chamberlin 2-pole filter), which, for example, is known as the "Oberheim" filter. With FILTOX, two such modules were cascaded per channel to achieve a switchable 24dB slope.

Our digital model of the filter is designed correspondingly so that it delivers the typical "analogue" sound character, but it's especially useful if you want to use internal overmodulation. Here interaction between cut-off frequency and resonance occurs, which makes the sound appear "undigital", in a positive way though.