Cheat Engine

[Egalestrenge]

Hi guys! I'm trying to hack Grandia III for the PS2 via PCSX2. Since this game does not show any subtitles while playing cutscenes (by cutscenes I mean engine rendered scenes, not CGs), it is hard to follow sometimes if for example you want to play the game with the japanese voices.

My idea here is to find when the game sends the "play voice x file" order to the engine, and do some stuff from it. But I don't really know how this order is executed, or if there is any kind of variable that the game uses in order to set the voice file pointer.

Since this variable is not visible in the game, I don't know how to start searching in the cheat engine, nor even the kind of variable to look for.

Do you guys know anything about how music, voices or sound could by hacked in games? Any ideas of how to approach this problem?

Thank you in advance!