Extracting sounds from Disney Infinity (Wii)

Hello!

I have a Wii ISO of Disney Infinity and I've been trying to extract voice effects from the game.

Inside the "sound" folder of the ISO there are loads of .fev and .fsb files, usually 1 of each for every character. For example, for Elsa there is:

fro_elsa.fev
fro_elsa_se.fsb

I've tried extracting the sounds with Dolphin and WiiScrubber but the same thing happens in each program. The filesizes are always 0 bytes after extraction.

Would anyone be able to help me? I'd like to extract sounds of the characters, such as Elsa and Jessie.

Any help would be greatly appreciated. Thanks!