Extracting PSP Audio from ISO

Hello folks,

I've been trying to extract audio from my PSP game (Fu-un Shinsengumi). Most of the tutorials here, they say that I need to find the at3 files, but the iso only have a few folders containing .BND, .BIN, .SFO files.
Does anybody knows how do I do this ? Please, help me...:psyduck:

It just uses a different format so can't be done unless someone has come up with custom tools for that exact game, I am not aware of anyone creating tools just for this game though so you may be out of luck

Oh...Ok then. Thank you very much for answering me.