This part is a kind of semiconductor called TDA1028.

Function of this product has Signal Souces Switch.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

The TDA1028 is a quadruple operational amplifier. Each amplifier has 2 switchable inputs which are protected by clamping diodes. The input currents are independent of the switch position and the outputs are short-circuit protected. [ ... ]

TDA1028 PDF Datasheet Download