Tried it on Shin Kidou Senki Gundam W - Endless Duel full SPC OST.
Used SPC to BRR function, it extracted everything. Then used Get Uniques, it done nothing(nothing happened in console, probably no duplicates). After that used BRR to WAV option and it converted everything.
End result is set of .wav files usable for anything you want them
Hmm, strange, there are some duplicates, actually