This part is a kind of semiconductor called ET2314.

Function of this product has 4-Channel Input Audio Processor.

Manufacturers : ETEK

Image and pinout :

Some of the text within the PDF file :

Etek Microelectronics ET2314 4-Channel Input Audio Processor General Description ET2314 is a four-channel input digital audio processor utilizing CMOS Technology. Volume, Bass, Treble and Balance are incorporated into a single chip. Loudness Function and Selectable Input Gain are also provided to build a highly effective electronic audio processor having the highest performance and reliability with the least external components. All functions are programmable using the I2C Bus. The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantage for audio application. Features z z z z z z z z z z z z z CMOS Technolog Least External Components Treble and Bass Control Loudness Function 4 Stereo Inputs with Selectable Input Gain Input/Output for External [ ... ]

ET2314 PDF Datasheet Download