au_get_gain
static void au_get_gain(struct audio_softc *, struct au_mixer_ports *,
au_get_gain(sc, &sc->sc_outports, &pgain, &pbalance);
au_get_gain(sc, &sc->sc_inports, &rgain, &rbalance);
au_get_gain(sc, &sc->sc_outports, &pi->gain, &pi->balance);
au_get_gain(sc, &sc->sc_inports, &ri->gain, &ri->balance);
au_get_gain(sc, &sc->sc_outports, &gain, &balance);
au_get_gain(sc, &sc->sc_outports, &gain, &balance);
au_get_gain(sc, &sc->sc_outports, &gain, &balance);