Megaman Legends - cutscene problem

i'm think there's something wrong with my iso. when i'm in a cut scene with megaman juno, in like halfway to the end of the cutscene, the voice disappears and the speed increases slightly but the background is still playing. is there something wrong with my emulator or the iso?

it will be your emulator configuration.

i see. i was worried that my iso f***ed. what should i do to fix it?