This state variable filter can be driven by tuned LFOs for a Frequency Modulation effect, beat synced envelopes for repeated wubs, and by MIDI notes for even more rhythmic variation and precision. External signals can drive the cutoff even more tuned control of the FM effect.
This filter allows quick mixing between LP, BP and HP via a single continuous parameter. Internal soft clipping keeps the filters from getting out of control peak when using high resonance on already resonant input signals.
Cut off frequency parameter is displayed as midi note number (integer), so you can tune the cutoff to specific equal temperament pitches. 57 = A below middle C = 220 Hz. The range extends to -36 (three octaves below midi note C-2) so that the high pass filter can effectively pass all audible frequencies.
The envelop can be triggered via automation in local mode, mouse clicks in any mode, and midi in remote midi mode. For Ableton Suite 11 users you can select the device input, even specific cells of a drum rack. Ableton 10 users will not have the remote MIDI options. Local mode is locked to the Ableton clock for timing.
Version 1.4 introduces a side chain style audio input that can drive an envelope (amp envelope follower via smoothing) or can drive the f.ill.ter cut off directly with its waveform.
with Version 1.5 you also get an instrument rack pre-mapped to the f.ill.ter so you can quickly/easily explore.
Thanks to Iggy Labs and Slynk for developing and sharing that remote midi code.
Thanks to ill.gates for ideas and feedback on the filter and interface design.
Feedback/Requests: google form
The f.ill.ter max for live device