Skip to main content
k2k audio logo k2k audio

Back to Filter
Documentation tree

Comb Resonator

A comb filter is a delay line fed back on itself — short delays create resonant tones at their reciprocal frequency (a 2.27 ms delay resonates at 440 Hz).

Parameters

ParameterRangeDefault
Frequency20.0 – 2000.0440.0
Feedback0.0 – 0.9990.90
Damping500.0 – 16000.05000.0
Dry/Wet0.0 – 1.00.5

Frequency — Resonance frequency in Hz, 20–2000. The pitch where the resonator rings. Acts like the perceived “note” of the resonator. Below 100 Hz produces deep, tubular resonances; 200–800 Hz is the most musical range for pitched effects; above 1 kHz starts to sound metallic and bell-like.

Feedback — How much of the resonator’s output is fed back into itself, 0 to 0.999. Low feedback (0.3–0.6) gives a short, plucky resonance — like a damped string. High feedback (0.95–0.999) sustains the resonance into long, ringing tones — like an undamped guitar string or a tuned pipe. Above 0.99 the resonance can sustain almost indefinitely, useful for drone-like effects.

Damping — In Waveguide mode only: lowpass cutoff (in Hz) inside the feedback path, 500–16000. Lower values produce darker, more wood-like resonances (energy is lost to high frequencies on each round trip — same physics as a real string losing brightness as it decays). Higher values stay bright, more glassy and metallic. Hidden in Comb and String modes.

Dry/Wet — Equal-power blend between dry (0) and the resonated signal (1). Useful for parallel use: keep the original signal forward and let the resonator add a tonal “shimmer” or “sympathetic ring” underneath. Labeled “Mix” in the UI.

Additional controls

Mode — The resonator algorithm. Comb — pure delay-line comb filter; metallic, sci-fi, robotic character (think classic Karplus-Strong without damping). String — Karplus-Strong with light damping; more natural, plucked-string character. Waveguide — full physical-modeling waveguide with the damping parameter exposed; can produce convincing string, pipe, and tube tones depending on settings.

About Comb Resonator

A comb filter is a delay line fed back on itself — short delays create resonant tones at their reciprocal frequency (a 2.27 ms delay resonates at 440 Hz). Pluck noise into a comb resonator and you get a pitched ringing — that’s how Karplus-Strong synthesizers turn noise bursts into plucked strings. Use this node to: turn drum hits into pitched percussion, add tonal sympathetic resonances to mixes, generate pitched-noise textures, or simulate physical resonating structures like strings and tubes. Pair multiple instances at chord-tone frequencies to create rich, harmonic resonant textures.


Generated 2026-05-05 from K2K_Dev@96730bdc by scripts/gen_lexique.py. Edit _intros/ or _overrides/, not this file.