code: function MIDINotMIDIError() {
      Error.call(this);
      Error.captureStackTrace(this, this.constructor);
  
      this.name = this.constructor.name;
      this.message = 'Not a valid MIDI file';
  }
docs: Construct a new MIDINotMIDIError
  
  @class MIDINotMIDIError
  @extends Error
  @classdesc An error that indicates that the file is not a MIDI file