Knock

Knock is a TR-909-based bassdrum synthesizer with transient shaping, analog-modeled drive, and a built-in reverb send. Designed for electronic music production, it delivers everything from classic house kicks to hard-hitting techno bassdrums in a single plugin. Featuring dual oscillator modes, six tick transient types, a dedicated Punch FX section, allpass cascade dispersion, a full Mackie-style strip EQ with per-hit Mod Ring modulation, a 50-sample layer engine, and a built-in RRV-10 reverb send, Knock covers the full spectrum from authentic vintage 909 character to modern hard-kick design.

Features

• Dual Oscillator Modes: Classic (authentic 909 triangle tone modeled after the original TR-909 bassdrum circuit) and ALT (cleaner, sine-like tone). Tune x2 and Decay x2 range extension switches plus chromatic MIDI tracking for melodic playing.
• 6 Tick Transient Types: Classic (2 kHz sine burst), FM (two-operator FM that tracks oscillator pitch), Noise (filtered noise burst), HP (highpass-filtered impulse), Chirp (fast downward pitch sweep), and Metal (inharmonic bell-like partials).
• Punch FX Section: Filter stage (LP/HP/BP) and four distortion algorithms (Tube, Tape, Clip, Fold) with frequency, resonance, grit, tone, and mix controls for shaping the transient character.
• Allpass Dispersion: Up to 256 cascaded second-order allpass filters for transient smearing and laser-sweep effects, with Pre/Post signal-chain placement and adjustable frequency, pinch, spread, and mix.
• Mackie-Style Strip EQ: Gain stage with analog console saturation (0–40 dB), high/low shelves, two parametric mid bands, and a switchable Pre/Post highpass filter (5–200 Hz).
• Mod Ring Per-Hit Modulation: Shared envelope (Exp, Lin, Log, Bump, Sine) with eight configurable depth targets across Strip EQ gain, EQ bands, frequencies, shelves, and reverb send for evolving tonal movement on every hit.
• Sample Layer Engine: 50 included samples plus custom WAV support, with pitch (±24 semitones), decay, HPF/LPF, timing offset, phase flip, velocity sensitivity, pogo pitch envelope, and four Strip EQ routing modes.
• RRV-10 Reverb Send: 9 modes (Room 1/2, Hall 1/2, Plate 1/2, M Tap 1/2, Gated) with pre-delay, time, tone, drive, and three tail behaviors (Off, Reset, Duck for sidechain ducking on the dry kick).
• Hardware Kick Presets: 24 base-frequency presets mapped to the top two MIDI octaves when chromatic MIDI tracking is off.
• Output Stage: One-knob tube-style drive, analog bus saturation, Clip 0dB protection with two-stage transparent limiting, and master level with up to +6 dB headroom boost.