Original URL: http://www.psxextreme.com/ps2-cheat-print/206.html
Amplitude

Blurry Mode

During gameplay, press R3, R3, R3, R3, L3, L3, L3, L3, R3

 Scramble Gem Positions

During gameplay, press X, X, LEFT, LEFT, R3, R3, RIGHT, RIGHT

Tunnel Mode

During gameplay, press L3, L3, L3, R3, R3, R3, L3, R3, L3 (Repeat for new view)

Turn Notes into Monkey Heads

During gameplay, press L3, L3, L3, L3, R3, R3, R3, R3, L3