Ripping audio from "Gex: Enter the Gecko"?

[kathy]

I've taken an .iso of the game and opened it with PSound. I can play the audio files and listen to Gex's voice clips, but there's one problem: the audio only plays for about two seconds before cutting off. This makes it impossible to listen to any of the longer files, which is sorely disappointing.
Converting the files to .wav does nothing to fix this, as those won't play properly either.

Is there something I'm doing wrong? People have ripped voices from the first and third games in the series and I thought it was time for someone to try the second one.