PluckStringNode


> Pluck String AudioNode for Web Audio API

Installation

``
npm install pluck-string-node
`

#### downloads:

- pluck-string-node.js
- pluck-string-node.min.js

API

$3

- constructor(audioContext, opts)
- audioContext: BaseAudioContext
- opts.color: number tone color (aka cutoff frequency)
- opts.timeConstant: number time constant until harmonics converges

#### Instance Attributes
- frequency: AudioParam _readonly_
- detune: AudioParam _readonly_
- color: number
- timeConstant: number

#### Instance Methods
- start(when: number): void
- stop(when: number): void

Quick Example

`js
var pluck = new PluckStringNode(audioContext);

pluck.color = 1000;
pluck.timeConstant = 10;
pluck.frequency.value = 880;
pluck.start(audioContext.currentTime);
pluck.stop(audioContext.currentTime + 4);
`

Demo

https://mohayonao.github.io/pluck-string-node/

Algorithm

This node's algorithm is inspired from Karplus–Strong string synthesis.

1. create OscillatorNode
2. OscillatorNode connect to WaveShaperNode which has random curve
3. WaveShaperNode connect to lowpass BiquadFilterNode
4. when start(), set color to the BiquadFilterNode frequency
5. and the cutoff frequency continuous change to very low frequency during timeConstant`.

AudioGraph

!pluck-string-node

License

MIT