Winmate A830 SBC, User Manual

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A830 SBC User Manual
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Chapter 7 AUDIO Driver Installation
7.1 Introduction
The Motherboard is equipped with the ALC203 is a 20 -bit DAC and 18-bit ADC
full-duplex AC'97 2.3 compatible stereo audio CODEC designed for PC multimedia
systems, including host/soft audio, and AMR/CNR based designs.
The ALC203 incorporates proprietary converter technology to achieve a high SNR
(greater than 100 dB), sensing logics for device reporting, and a Universal Audio
Jack® for improved user convenience. The ALC2 03 AC'97 CODEC supports multiple
CODEC extensions with independent variable sampling rates and built -in 3D effects.
The ALC203 CODEC provides two pairs of stereo outputs with independent volume
controls, a mono output, multiple stereo and mono inputs, alon g with flexible mixing,
gain, and mute functions to provide a complete integrated audio solution for PCs.
The circuitry of the ALC203 CODEC operates from a 3.3V digital and 3.3V/5V
analog power supply with EAPD (External Amplifier Power Down) control for use in
notebook and PC applications. The ALC203 integrates a 50mW/20Ohm headset audio
amplifier into the CODEC, saving BOM costs. The ALC203 also supports the S/PDIF
out function (complies with AC'97 2.3) that offers easy connection of PCs to
consumer electronic products, such as AC3 decoders/speakers and mini disk devices.