GUS_LEFT_RIGHT_OFFSET
sc->sc_stereo.dmabuf = boarddma + GUS_LEFT_RIGHT_OFFSET;
(gus_dostereo && sc->sc_channels == 2 ? GUS_LEFT_RIGHT_OFFSET : 0);
(gus_dostereo && sc->sc_channels == 2 ? GUS_LEFT_RIGHT_OFFSET : 0)