The PS2 ISO is low resolution (480i). If you are playing on a PC, you can make the game look much sharper:
: Standard Guitar Hero cheats (like "Unlock All Songs") usually still work unless specifically disabled by the modder. Example Tracklist Highlights Guitar Hero Pop Indonesia Ps2 Iso
Indonesian Pop songs sometimes have very fast note charts that look like a blur. The PS2 ISO is low resolution (480i)