FlowFilter

FlowFilter by Stagecraft Software is a free filter plugin built for audio-rate modulation, letting every parameter move at the speed of sound. Its upgraded State-Variable Filter core delivers a smooth, analog-style response with zero artifacts, whether you’re doing surgical EQ sweeps or wild rhythmic modulation. Morph filters cover DJ-style sweeps and XY-controlled morphing, while analog-modeled zero-delay filters bring vintage synth character and modern classics. Comb, Formant and Tone modes add metallic resonances, flanging and unique harmonic structures, with advanced comb options for complex, multi-layered filtering. Link cutoff, resonance and filter type to an LFO or envelope follower for reactive, breathing soundscapes, and automate everything for expressive movement. With factory preset packs and support for all major DAWs on Windows and Mac, FlowFilter suits hobby producers seeking a versatile, characterful filter for electronic, experimental and sound-design work.