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index.js conga.js cowbell.js hihat.js kick.js mini.js monosynth.js pluck.js snare.js tom.js tonewheel.js delay.js feedback-comb-filter.js filter.js gain-envelope.js gain.js lfo.js mono-buffer.js noise.js osc-bank.js osc.js pulse.js sample.js soft-clipper.js source.js vca.js vcf.js vco.js wave-shaper.js synth.js

¶

Feedback Comb Filter

import { createAudioNode } from "../synth"
import Gain from "./gain"

¶

The feedback comb filter can be used as a computational physical model of a series of echoes, exponentially decaying and uniformly spaced in time.
¶

References

¶

https://ccrma.stanford.edu/~jos/pasp/Feedback_Comb_Filters.html

/**
 * Create a FeedbackCombFilter
 */
export default function FeedbackCombFilter (ac, config) {
  config = Object.assign({}, FeedbackCombFilter.defaults, config)
  const feedback = Gain(ac, config)

¶

Create a delay with an extra param

  const filter = createAudioNode(ac, "Delay",
    FeedbackCombFilter.params, config.maxDelay)
  filter.resonance = feedback.gain
  filter.connect(feedback)
  feedback.connect(filter)
  return filter.update(config)
}
FeedbackCombFilter.params = ["delayTime", "resonance"]
FeedbackCombFilter.defaults = {
  maxDelay: 1,
  delayTime: 0.1,
  resonance: 0.5
}