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Playstation 2 - Guitar Freaks And DrumMania: Masterpiece Gold cheats

Guitar Freaks: 

R = Red
G = Green
B = Blue 
P = Pick

Best Record view:
Hold R + G + B and press Select at the music selection screen. 

Unlock Extreme difficulty:
Hold G and then press P, P at the music selection screen. 

Unlock Faster note scroll speed:
Press G, G at the music selection screen. 

Unlock Sorts the music list:
Hold G and press Select at the music selection screen.

Unlock Disable all Play Style codes:
Press P, P, P, P at the music selection screen. 

Play Style menu:
Hold Start after selecting a song at the music selection screen. 

Unlock Bass and Open P guitar mode:
Press P, G, G, P at the music selection screen.