Select the "Extras" option at the main menu. Select "Modify Game" option then enter one of the following codes

Code	Result
Press Red, Yellow, Blue, Red(2), Blue(2), Red, Yellow, Blue.	All songs
Press Blue, Orange(2), Blue, Yellow, Blue, Orange(2), Blue, Yellow.	All venues
Press Yellow, Blue, Orange, Yellow, Blue, Orange, Yellow, Blue, Orange.	Awesome Detection
Press Blue, Yellow, Red, Blue, Yellow, Red, Blue, Yellow, Red.	Stage mode