The game could do things to the audio stream, though.  And it can come from other sources than mp3.  If the PSP doesn't do it on mp3s, it shouldn't be done there.

And another hack setting here doesn't seem great.  I know people will create forks if there aren't enough hacks, but I may create my own fork without the crappy hacks and just change things there if there are too many.  The danger goes both ways.

-[Unknown]