CSPORT_MONITOR
sc->sc_mute[CSPORT_MONITOR] = 1;
if (sc->sc_mute[CSPORT_MONITOR]) {
sc->sc_mute[CSPORT_MONITOR] = cp->un.ord ? 1 : 0;
cp->un.ord = sc->sc_mute[CSPORT_MONITOR] ? 1 : 0;