Enter the following codes in the cheat codes menu using your guitar to unlock the benefit mentioned right below the code.

Red, Red, Blue, Yellow, Green, Green, Green, Yellow
Air Instruments

Green, Green, Red, Red, Yellow, Red, Yellow, Blue
Always Slide

Yellow, Green, Red, Red, Green, Blue, Red, Yellow
AT&T Ball Park

Yellow, Green, Red, Blue, Blue, Blue, Blue, Red
Auto Kick

Green, Red, Yellow, Blue, Red, Yellow, Blue, Green
Extra Line 6 Tones

Green, Red, Green, Blue, Red, Red, Yellow, Blue
Flame Colors

Blue, Red, Red, Green, Red, Green, Red, Yellow
Gem Colors

Green, Blue, Red, Yellow, Yellow, Red, Green, Green
Hyper Speed

Green, Red, Yellow, Yellow, Yellow, Blue, Blue, Green
Invisible Rocker

Yellow, Yellow, Blue, Red, Blue, Green, Red, Red
Performance Mode

Red, Red, Yellow, Red, Blue, Red, Red, Blue
Star Colors

Blue, Red, Yellow, Yellow, Yellow, Yellow, Yellow, Green
Unlock Aaron Steele

Blue, Blue, Red, Green, Green, Blue, Blue, Yellow
Unlock All Quick Play Songs

Blue, Red, Blue, Blue, Yellow, Yellow, Yellow, Green
Unlock Johnny Viper

Green, Red, Blue, Green, Red, Blue, Blue, Green
Unlock Nick

Blue, Red, Green, Green, Yellow, Yellow, Yellow, Green
Unlock Rina

Red, Green, Green, Yellow, Blue, Green, Yellow, Green
Vocal Fireball