docs: function Yamaha(ip, responseDelay, requestTimeout)
  {
      if (typeof responseDelay == 'string' || responseDelay instanceof String) responseDelay = parseInt(responseDelay);
      if (!responseDelay) responseDelay = 1;
      this.ip = ip;
      this.responseDelay = responseDelay;
      this.pollingDelay = 500; // used for menu ready check, webradio e.g.
      this.requestTimeout = requestTimeout;
      this.catchRequestErrors = true
  }