A CP650 accessory, the Dolby Cat. No. 735 microphone, mounted permanently and inconspicuously in the auditorium, works in conjunction with the Auditorium Assist feature provided in all CP650s to help you maintain consistently high performance from your cinema’s sound system.

Once your room is initially aligned, Auditorium Assist uses the Cat. No. 735 to take measurements of the frequency response and level of each channel, plus the room’s ambient noise floor, which are then stored within the CP650 as your Auditorium Reference. Thereafter, whenever you run Auditorium Assist, it takes the measurements again and compares them to the Auditorium Reference, all in less than 90 seconds. You are alerted to any discrepancies to help you diagnose and resolve faults that may have occurred in the speakers or other system components.