Things You'll Need
Instructions
Attach the Xbox 360 headset to your controller. The headset plug resembles that of any regular set of headphones. The headphone jack on the Xbox 360 controller is on the bottom in the center.
Turn on the Xbox 360 console while "Rock Band 2" is in the disc tray.
Press "A" on Quickplay when the game loads. The game will automatically detect you as the vocalist and you can play using the Xbox 360 controller.