This part is a kind of semiconductor called AK4588.

Function of this product has 2/8-Channel Audio CODEC.

Manufacturers : Asahi Kasei Microsystems

Image and pinout :

Some of the text within the PDF file :

[AK4588] AK4588 2/8-Channel Audio CODEC with DIR GENERAL DESCRIPTION The AK4588 is a single chip CODEC that includes two channels of ADC and eight channels of DAC. The ADC outputs 24bit data and the DAC accepts up to 24bit input data. The ADC has the Enhanced Dual Bit architecture with wide dynamic range. The DAC introduces the new developed Advanced Multi-Bit architecture, and achieves wider dynamic range and lower outband noise. The AK4588 has a dynamic range of 102dB for ADC, 106dB for DAC and is well suited for digital surround for home theater and car audio. The AK4588 also has the balance volume control corresponding to Dolby Digital (AC-3) system, digital audio receiver (DIR) and transmitter (DIT) compatible with 192kHz, 24bits. The DIR has 8-channel input selector and can automatic [ ... ]

AK4588 PDF Datasheet Download