Rave Generation Knock

Circuit-accurate 909 core

• Hardware-measured TR-909 bassdrum with triangle oscillator, LFSR noise click, diode clipping, transistor VCA, and RC envelopes.

Dual oscillator modes

• Classic (authentic 909 triangle with asymmetry and rounding) and ALT (SVF bridged-T network for a cleaner, resonant tone). Both respond to the same pitch, sweep, and waveshaping controls.

Independent Sweep Depth

• Separate control over pitch sweep amount (0-600 Hz), independent from sweep time. At 0% there is no pitch drop (pure sub). At 33% it matches the original 909. Crank it for laser territory.

Body Waveshaper

• Continuous waveshaper that morphs the oscillator from pure sine to parabolic, adding warm even harmonics (2nd harmonic) that fatten and thicken the kick body without adding the mud of a standard saturator.

Six tick transient types

• Classic (2kHz sine burst), FM (metallic FM impulse), Noise (filtered noise burst for airy presence), HP (highpass-filtered), Chirp (fast pitch-swept electronic zap), and Metal (inharmonic bell partials for industrial texture).

Dedicated Punch FX section

• Time-windowed transient processor with four filter types (LP/HP/BP), four distortion algorithms (Tube/Tape/Clip/Fold), tone shaping, and a wet/dry mix - all applied only to the transient zone of the kick for surgical attack control.

Sample Layer

• One-shot sample player with 50 embedded samples (attacks, clicks, punches) for layering on top of the synthesized kick. Includes pitch shifting (±24 st), decay envelope, highpass and lowpass filters, timing offset, phase flip, velocity sensitivity, and a pitch bend (pogo) envelope. Configurable Strip EQ routing lets the sample bypass, share clean EQ, receive modulated EQ, or pass through the full gain + EQ chain.

Disperse

• Allpass cascade engine with up to 256 second-order allpass filter stages for transient smearing and laser sweep effects. Controls for center frequency (20-5000 Hz), stage count, pinch (Q), frequency spread, and dry/wet mix. Selectable Pre or Post signal chain position - Pre for smoother musical sweeps, Post for grittier dispersion after drive.

Strip EQ

• Full channel strip with 0-40 dB gain (with analog console saturation), dual parametric mid bands with adjustable frequency and Q, high and low shelving EQ (±15 dB), and an 18 dB/oct highpass filter with adjustable frequency (5-200 Hz) and selectable Pre/Post gain routing.

Mod Ring

• Per-hit envelope modulation system that dynamically shapes the Strip EQ and reverb send on every trigger. Five envelope shapes (Exp, Lin, Log, Bump, Sine) with independent depth controls for Lo-Mid gain, Hi-Mid gain, Lo-Mid frequency, Hi-Mid frequency, strip gain, send level, high shelf, and low shelf. Create transient EQ sweeps, per-hit gain boosts, and rhythmic tonal movement without automation.

One-knob output drive

• Warm tube-like saturation with asymmetric soft clipping, plus independent HI MID and HIGH coloration controls for final tonal sculpting.

Built-in reverb send

• Nine reverb modes (Room, Hall, Plate, Multi-Tap, Gated) with pre-delay, tone shaping, drive on the wet signal, and three tail modes: Off (natural ring), Reset (clean per hit), or Duck (sidechain pumping effect).

Clip 0dB protection

• Two-stage soft-knee limiter + hard clip for transparent output limiting without audible artifacts.

CORE Section

• TUNE : Controls the pitch sweep time. Higher values produce a longer, more pronounced pitch drop. Works together with SWEEP to shape the attack character.
• SWEEP : Controls the pitch sweep depth - how far the frequency drops. 0% = no sweep (pure sub), 33% = 909 default, 100% = laser/Simmons territory.
• ATTACK : Controls the initial transient loudness (909 click level).
• DECAY : Controls how long the bassdrum rings out.
• HOLD : Sets the hold time (0-100 ms) before the decay begins for a fatter, more sustained body.
• BODY : Adds weight and low-end presence by boosting the oscillator body gain.
• SNAP : Controls the snap transient - a fast 400 Hz pitch burst at the start for extra cut-through.
• LEVEL : Master velocity/level control for the bassdrum output.
• OSCILLATOR : Classic (909 triangle) or ALT (SVF bridged-T).
• CLICK : Classic (original 909 click) or ALT (punchier, harder-edged).
• MIDI : Toggles chromatic MIDI note tracking for melodic/chromatic playing.
• TUNE X2 : Doubles the tuning range for higher-pitched kicks.
• DECAY X2 : Doubles the decay time range for longer, boomy kicks.

PUNCH Section

• TICK : Controls the tick transient level.
• TIME : Sets the duration of the punch envelope window.
• FREQ : Sets the frequency for the punch filter.
• RESO : Filter resonance amount.
• GRIT : Controls the distortion intensity within the punch section.
• TONE : Shapes the tonal balance of the punch effect.
• MIX : Blends the punch-processed transient with the dry transient signal.
• TICK TYPE : Selects the tick transient character - Classic, FM, Noise, HP, Chirp, or Metal.
• FILTER : Selects the punch filter type - Off, LP, HP, or BP.
• ALGO : Selects the punch distortion algorithm - Tube, Tape, Clip, or Fold.
• TONE Section
• SHAPE : Body waveshaper - morphs the oscillator from sinusoidal to parabolic, adding warm even harmonics.
• DRIVE : One-knob distortion with warm, tube-like character. Smoothly goes from clean to crunchy.
• HI MID : Adds or removes midrange presence around 2.4 kHz.
• HIGH : Brightens or darkens the overall tone by adjusting high-frequency content.
• HP FREQ : Sets the highpass (lo-cut) filter frequency from 5 Hz to 200 Hz. Only active when HP POSITION is enabled in the Strip EQ.
• VOLUME : Master output level control.
• CLIP 0dB : Enables transparent 0 dB output limiting.

DISPERSE Section

• FREQ : Center frequency of the allpass filter chain (20-5000 Hz). Lower values create deeper, sub-heavy dispersion sweeps. Sweet spot for bassdrums is typically 50-500 Hz.
• AMOUNT : Number of cascaded allpass filter stages (0-256). More stages create a longer, more pronounced laser sweep. High values (150+) with high Spread can create resonant tail effects.
• PINCH : Controls how tightly the phase rotation concentrates around the center frequency. Low values = cleaner, broader effect. High values = narrower, more aggressive resonant sweep.
• SPREAD : Distributes the allpass stages across a frequency range. At 0 all filters share the same frequency. Higher values create richer, more complex smearing with logarithmic distribution.
• MIX : Dry/wet blend (0-100%).
• POSITION : Selects where the dispersion sits in the signal chain - Pre (before tone/drive, smoother sweeps) or Post (after drive, grittier character).

STRIP EQ Section

• GAIN : Input gain with analog console saturation (0-40 dB).
• HI SHEL / LO SHEL : High and low shelving EQ (±15 dB).
• HI MID / LO MID : Dual parametric mid-band EQ (±15 dB) with adjustable frequency and Q.
• HP POSITION : Enables the highpass filter and selects its position - Off, Post (after gain), or Pre (before gain, prevents low-frequency resonant slamming at extreme settings).
• EQ IN : Enables or disables the EQ section. Note: when HP POSITION is set to Pre, the highpass remains active even with EQ IN off.

SAMPLE Section

• LEVEL : Controls the mix level of the sample layer into the kick signal.
• PITCH : Pitch shift in semitones (-24 to +24).
• DECAY : Amplitude decay envelope for the sample. Lower values create shorter, tighter transients; higher values let more of the sample tail through.
• HPF : Highpass filter for the sample signal. Removes low-frequency content to avoid muddying the sub.
• LPF : Lowpass filter (tone control) for the sample. Shapes brightness from dark to bright.
• OFFSET : Sample timing offset in milliseconds (0-10 ms). Controls when the sample triggers relative to the kick. Default is 1.2 ms (aligned with the kick transient).
• SAMPLE : Selects which sample to layer from the 50 included samples. The first option (Off) disables the sample layer entirely.
• STRIP EQ : Controls how the sample is routed through the Strip EQ - Off (bypasses strip entirely), EQ (kick gets full strip, sample gets a clean copy of the EQ without gain or mod), EQ+Mod (kick gets gain first, then sample mixed in for modulated EQ together), or EQ+Gain (sample goes through entire strip with kick).
• PHASE : Flips the polarity of the sample signal for phase alignment.
• VEL : Velocity sensitivity for the sample layer. At 0, the sample plays at full volume regardless of MIDI velocity.
• POGO : Pitch bend envelope in semitones (-24 to +24). Sweeps the sample pitch up or down at the start of each hit.

MOD RING Section

• MOD DECAY : Shared envelope decay time for all Mod Ring targets. 0 = snappy (15 ms), 0.5 = medium (50 ms), 1.0 = slow (100 ms).
• MOD SHAPE : Envelope shape for all targets - Exp (exponential decay, peak on beat), Lin (linear ramp), Log (holds high, drops fast at end), Bump (smooth half-sine hump), or Sine (full cosine LFO cycle, resets on trigger - flip depth sign to invert).
• MOD LO MID : Modulation depth for Strip EQ Lo-Mid gain (±15 dB).
• MOD HI MID : Modulation depth for Strip EQ Hi-Mid gain (±15 dB).
• MOD LO FRQ : Modulation depth for Strip EQ Lo-Mid frequency (±10).
• MOD HI FRQ : Modulation depth for Strip EQ Hi-Mid frequency (±10).
• MOD GAIN : Modulation depth for Strip EQ gain stage (±40 dB). Creates transient gain boosts or dips on each hit.
• MOD SEND : Modulation depth for reverb send level (±100%).
• MOD HI SHEL : Modulation depth for Strip EQ high shelf (±15 dB).
• MOD LO SHEL : Modulation depth for Strip EQ low shelf (±15 dB).

SEND FX Section

• PRE-DLY : Pre-delay time before the reverb effect begins.
• TIME : Reverb decay time (stepped 0-15).
• TONE : Shapes the reverb tone from dark (left) to bright (right).
• DRIVE : Adds saturation to the reverb wet signal.
• SEND : Reverb send level (additive - dry signal always passes through at full level).
• REVERB : Selects the reverb algorithm - Room 1/2, Hall 1/2, Plate 1/2, M Tap 1/2, or Gated.
• TAIL : Controls reverb behavior on each trigger - Off (natural ring), Reset (clean per hit), or Duck (sidechain pumping).