function AudioVoice() {
    audioVoice_classCallCheck(this, AudioVoice);
    this.ac = main.audiocontext;
    this.output = this.ac.createGain();
    this.connect();
    main.soundArray.push(this);
  }
Base class for monophonic synthesizers. Any extensions of this class
should follow the API and implement the methods below in order to
remain compatible with p5.PolySynth();

@class p5.AudioVoice
@constructor