disconnect() {
    if (this.output) {
      this.output.disconnect();
      // stay connected to amplitude even if not outputting to p5
      this.output.connect(this.amplitude.input);
    }
  }
Disconnect the AudioIn from all audio units. For example, if
 connect() had been called, disconnect() will stop sending
 signal to your speakers.<br/>

 @method  disconnect
 @for p5.AudioIn