CHAN_OP_STOP
case CHAN_OP_STOP:
case CHAN_OP_STOP:
uaudio_chan_reconfigure(&sc->sc_rec_chan[i], CHAN_OP_STOP);
uaudio_chan_reconfigure(&sc->sc_play_chan[i], CHAN_OP_STOP);
uaudio_chan_reconfigure(ch, CHAN_OP_STOP);