The Filter Twin® features two identical filters that move in opposite directions—one ascending in frequency and the other descending—to create classic 70s funk vibes or entirely fresh and innovative filter sounds. The simultaneous movement of both filters provides a more natural, vocal-like quality and enables you to explore expressive new tones unattainable with other pedals. With its user-friendly four-knob configuration, the Filter Twin® delivers distinctive filter effects. The BLEND knob lets you fine-tune the mix between the filters, while the THRESHOLD knob adjusts the unit's sensitivity to varying playing styles. Additionally, the VELOCITY knobs control the speed of each filter.