Glou-Glou Pralines

Four parallelized resonant band pass filters⎜Phaser/Tremolo/Fuzz

Do you want a phaser with unprecedented control? Do you want beautiful vibrato? How about some gnarly synth sounds with fuzz? Here you go. The Pralines covers all of this… and then some.

∙ At the heart of PRALINES, there’s a special filter which consists of 4 band-pass filters running in parallel.
∙ Each filter frequency can be controlled independently. (FREQ) Resonance however, is a global parameter for all 4 of the filters. (PEAK)
∙ Filters can be blended with the dry signal. (MIX)
∙ Modulation applied to filters frequency can be either envelope, LFO or expression pedal. (MOD)
∙ The LFO speed can be controlled by envelope or expression pedal. (LFO CTRL)
∙ A gated FUZZ helps add to the synth-like experience.

As said before, there is 4 parallel band-pass filters. It’s comparable to a double EHX Bass-Balls (which is 2 band-pass filters in parallel), or a quarter of a vocoder (which is 16 band-pass filters in parallel). It could also be referred to as a formant filter.
The frequency range of the filters goes from sub-bass up to mid-treble; They were specifically designed not to oscillate at high frequencies preventing possible damage to your ears or speakers.
The PEAK knob controls the global resonance of this formant filter. When fully CCW, the sound is soft/flat and it will act as a 4 band parametric equalizer. Mixed with out-of-phase dry signal, phase cancellation occurs and it’s capable of producing phaser/vibrato sounds. As you increase the PEAK value, you increase the resonance of each band-pass filter and less phase cancelation occurs.
When fully CW, filters self-oscillation occurs and you now have 4 controllable sine-wave VCO’s. You can even make nice chords!

https://glou-glou.org/pralines/