Jump To … +

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

HiHat

import { instrument } from "../synth"
import OscBank from "../kit/osc-bank"
import Filter from "../kit/filter"
import Gain from "../kit/gain"
import GainEnvelope from "../kit/gain-envelope"

¶

A HiHat modeled after the 808 design

References

Synth secrets: https://github.com/micjamking/synth-secrets/blob/master/part-40.md

const BASE_FQ = 400
const RATIOS = [263, 400, 421, 474, 587, 845].map(f => f / BASE_FQ)

/**
 * Create a HiHat
 */
export function HiHat (ac, state) {
  state = Object.assign({}, HiHat.defaults, state)

¶

Architecture
```
  const hihat = instrument(ac, {
```

six square-wave oscillators

    bank: [OscBank(ac, RATIOS, state.bank), "midFilter"],

¶

band pass filter
```
    midFilter: [Filter, "envelope"],
```

AD envelope

    envelope: [GainEnvelope, "hiFilter"],

¶

hipass filter
```
    hiFilter: [Filter, "amp"],
```

amplifier

    amp: [Gain, "output"]
  }).update(state)

API

trigger

  hihat.trigger = hihat.envelope.trigger

  console.log(hihat)

  return hihat
}

HiHat.defaults = {
  bank: {
    frequency: BASE_FQ,
    types: ["square"],
    gains: [0.5],
    compensate: false,
  },
  midFilter: {
    type: "bandpass",
    frequency: 10000,
  },
  envelope: {
    attack: 0.01,
    decay: 0.1,
  },
  hiFilter: {
    type: "highpass",
    frequency: 8000,
  },
  amp: {
    gain: 0.8,
  },
}

export default HiHat

HiHat

Architecture

API