1892 Datasheet, NEC

* Three surround modes are available: movie, music and simulated
* Built in volume and balance control (All control voltage: 0 V to 5 V)
* Built in tone contr.

Power supply pin. Capacitor connection pin which determines time constant of phase shifter. Pin 2 is used for movie, music, simulated mode. Pins 2, 3, 4, 5 is used for movie, simulated mode. Recommended value of capacitor is as follows. Pin 2: 0.1 µF.