Dolby(R)

The NR (Dolby(R) Noise Reduction) button (when equipped) is a non-latching momentary contact control that serves a dual function with radio preset 4 (Oldsmobile and Pontiac), 6 (Buick). Depressing this control in the tape mode, switches Dolby(R) noise reduction off or on. A Dolby(R) symbol will appear in the display while in the tape mode and this function is active.