This part is a kind of semiconductor called 7430.

Function of this product has DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX AND VOICE CANCELLER.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® TDA7430 TDA7431 DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX AND VOICE CANCELLER 1 STEREO (4 STEREO) INPUT + 1 MIXER INPUT INPUT ATTENUATION CONTROL IN 0.5dB STEP VOICE CANCELLER IS AVAILABLE TREBLE MIDDLE AND BASS CONTROL THREE SURROUND MODES ARE AVAILABLE: - MUSIC: 4 SELECTABLE RESPONSES - MOVIE AND SIMULATED: 256 SELECTABLE RESPONSES 2 SPEAKER AND 2 RECORD ATTENUATORS: - 2 INDEPENDENT SPEAKERS AND 2 INDEPENDENT RECORD CONTROL IN 1dB STEP FOR BALANCE FACILITY - AVAILABILITY OF LOUDSPEAKER EQUALIZATION FIXED BY EXTERNAL COMPONENTS - INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS DESCRIPTION The TDA7430/7431 are volume tone (bass middle and treble) balance (Left/Right) processors with PIN CONNECTIONS PS4 PS3 PS2 PS1 LP LP1 HP1 HP2 VOUTREF VAR_L [ ... ]

7430 PDF Datasheet Download