pss_set_treble    199 dev/isa/pss.c  int	pss_set_treble(struct pss_softc *, u_int);
pss_set_treble   1036 dev/isa/pss.c      (void)pss_set_treble(sc, AUDIO_MAX_GAIN/2);
pss_set_treble   1345 dev/isa/pss.c  	    error = pss_set_treble(sc, (u_char)cp->un.value.level[AUDIO_MIXER_LEVEL_MONO]);