TEA5764_TNCTRL_MU
r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
r->tnctrl |= TEA5764_TNCTRL_MU;
r->tnctrl &= ~TEA5764_TNCTRL_MU;