Instructions
Confirm that the Nintendo Wii off. If it is not, press the "Power." button located on the front, bottom left of the console.
Connect the microphone to either of the USB ports located on the back of the Wii.
Turn the Nintendo Wii on by pressing the "Power." button. Insert the Guitar Hero: World Tour disc.
Select the Guitar Hero: World Tour icon at the top left of the Wii Channel menu. This will start the game.
Use the microphone when prompted in-game.