For voice & grunt sounds, you need to modify your character's UPL. Species available are

species=UT3xGame.SPECIES_Bishop
species=UT3xGame.SPECIES_Corrupt
species=UT3xGame.SPECIES_IronGuard
species=UT3xGame.SPECIES_Jester
species=UT3xGame.SPECIES_Necris
species=UT3xGame.SPECIES_Othello