16.4 MB

Dual-Filter Motion Lab. Toxic is a free dual-filter effect built for the KVR Developer Challenge 2026. It combines serial/parallel routing, three drive stages, analog and digital filter models inspired by the topology of a hardware VA synthesizer, LFOs, an envelope follower, and macro control in one performance-ready plug-in.

Filter concept
Toxic’s filter section is inspired by the topology of a legendary hardware VA synthesizer: a flexible dual-filter structure with serial/parallel routing, multiple analog-style and digital-style filter characters, and formant/vowel movement designed for animated sound design.

It is not a clone or an official emulation. The goal is to capture the workflow idea of a performance-oriented dual-filter synthesizer architecture and rebuild it as a free creative effect for modern DAW use.

Key Features
– Dual Filter Architecture — Filter 1 and Filter 2 can work in serial or parallel routing.
– Analog / Digital Filter Selection — Each filter can switch between analog-style and digital-style filter families.
– Multiple Filter Types — LPF, HPF, BPF, Notch, Peak, All-Pass, Comb, Buzz, Formant, and other character models.
– Three Drive Stages — Input Drive, mid-stage Drive 2, and Output Drive let you shape density before, between, and after the filters.
– Drive Character Choices — Tube saturation, diode clipping, germanium clipping, foldback, tape-style saturation, crunch, soft/hard clipping, bit crush, and decimation.
– LFO 1 / LFO 2 — Free-running or host-synced modulation with sine, triangle, saw, square, pulse, S&H, Perlin, stepped, damped, chirp, bounce, and ring-style motion.
– Envelope Follower — Drive the filter from the input signal with Attack, Hold, Decay, Release, Threshold, Scale, Amount, and Invert controls.
– Macro 1 / 2 / 3 — Assign multiple parameters to one performance control, including positive and negative modulation amounts.
– Expert / Perform UI — Use Expert mode for detailed patch design, then switch to Perform mode for large, direct controls on stage or during automation passes.
– Modulation Arc Display — Visual feedback around controls shows assignment amount and modulation movement.

Visit Developer Site

Toxic.1.0.2  ( 16 MB )