SB_LR
sc->gain[cp->dev][SB_LR] = cp->un.ord != 0;
sc->gain[cp->dev][SB_LR] = cp->un.ord != 0;
if (sc->gain[swap][SB_LR]) {
if (!sc->gain[mute][SB_LR]) {
cp->un.ord = sc->gain[cp->dev][SB_LR];