gibberish-dsp/js/envelopes/ad.js

Gibberish is designed to be an optimized API for audio synthesis using per-sample techniques.

const ugen = require( '../ugen.js' ),
      g = require( 'genish.js' )

module.exports = function( Gibberish ) {

  const AD = function( argumentProps ) {
    const ad = Object.create( ugen ),
          attack  = g.in( 'attack' ),
          decay   = g.in( 'decay' )

    const props = Object.assign( {}, AD.defaults, argumentProps )

    const graph = g.ad( attack, decay, { shape:props.shape, alpha:props.alpha })

    ad.trigger = graph.trigger
    
    const __out = Gibberish.factory( ad, graph, ['envelopes','AD'], props )

    return __out
  }

  AD.defaults = { attack:44100, decay:44100, shape:'exponential', alpha:5 } 

  return AD

}