IBM 3301690, User Manual

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3301690 CPU Card
D.1 Introduction
The audio functionalities of the 3301690 CPU card can be implemented using a
separately purchased audio module, the AC-KIT08R-R10. The audio kit is powered by a
Realtek ALC655, which is a 16-bit, full duplex AC’97 2.3 compatible audio CODEC with
48KHz sampling rate. The audio kit functionalities are interfaced through three (3) phone
jack connectors and two (2) pin headers including:
1. A LINE input shared with surround output
2. A MIC input shared with Center and LFE output
3. A LINE output
4. Analog line-level stereo inputs with 5-bit volume control: CDIN1 and AUXIN1.
Both Front_out and Surround_out are equipped with a built-in 50mW/20ohm amplifier. The
ALC655 supports host/soft audio from Intel ICHx chipsets as well as audio controller based
VIA/SIS/Ali/ATI chipset with bundled Windows series drivers (XP/ME/2000/98/NT),
EAX/Direct Sound 3D/I3DL2/A3D compatible sound effect utilities supporting Karaoke, 26
kinds of environment sound emulations with 10-band equalizer, and HRTF 3D positional
audio. The audio kit provides an excellent entertainment package sufficient for today’s
multimedia systems.
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