OneKnob Filter: Single-Knob Low-Pass Filter by Waves

The core of OneKnob Filter is its 12 dB/octave low-pass filter. Waves says the filter is designed for silky-smooth sound, and the cutoff moves continuously from below 20 Hz to above 20 kHz. The plugin is built to sweep the filter frequency without quantized stair-stepping, so movement across the range stays smooth rather than jumping between steps.

The Resonance button gives you four levels, from no resonance to extreme. Because the sweep is continuous, the resonance peak moves with the cutoff in a steady way, which suits filter sweeps on pads, basslines and full mixes.

OneKnob Filter has one main control, so it is quick to set up and easy to automate. Waves positions it as a fast, easy-setup filter for dance productions and breakdowns, where a single sweep often carries a section change.

For live work, the developer notes that the plugin uses the same familiar sound and control as DJ club mixers. You can automate the knob for wah-style effects or build tension during a set. In the studio, the same sweep can shape instrumental and vocal tone.