nvelope/amod.js

enveloping for audio and time domain DSP

module.exports = function (pts) {
  return function (t) {
    for (var a = pts; a.length > 1; a = b){
      for (var i = 0, b = [], j; i < a.length - 1; i++){
        for (b[i] = [], j = 1; j < a[i].length; j++){
          b[i][j] = a[i][j] * (1 - t) + a[i+1][j] * t;
        }
      }
    }
    return a[0][1];
	}    
}