Make sure your music game controller that you are trying to sync has fresh batteries.Make sure your Legacy Game Controller Adapter is plugged in to your Xbox One.Make sure your Xbox One is turned on and you have Rock Band 4 running.You do NOT need to sync microphones - as long as a controller is synced to your console, plug in your microphone via USB and you're good to go! Keep in mind that you must have the Legacy Game Controller Adapter hooked up to your Xbox One to play Rock Band 4 with compatible legacy instruments.

Please refer to our Rock Band 4 Instrument Compatibility Chart for a list of available legacy game controllers. How do I sync my legacy game controllers on the Xbox One? In order to support the vast amount of cool Xbox 360 wireless Rock Band controllers already out there, Mad Catz and Harmonix worked together to design Legacy Game Controller Adapter for Xbox One that enables backwards compatibility for most legacy wireless Rock Band controllers. Because of this, wireless Xbox 360 controllers and accessories aren’t natively compatible with the Xbox One. With Xbox One, Microsoft updated the wireless connectivity security protocol that exists between wireless controllers and the receiver on the console.

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