CMI8738-MX Datasheet, PDF (4/32 Pages) C-Media Electronics – PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional Audio Chip

CMI8738
PCI-6CH C3DX series /PCI-Based HRTF 3D Extension Positional Audio Chip
1. Description and Overview
With high speed PCI V2.1 bus controller and legacy audio SBPro® DSPemulator,CMI8738 is designed for PC
add-in cards and all-in-one motherboards. No external CODEC is needed in CMI8738: CMI-8738 supports the
legacy audio – SBPRO™, FM emulator/DLS wavetable music synthesis, and HRTF 3D positional audio functions.
Drivers support EAX® , Karaoke Key, Echo……functions. Above all CMI8738 supports PCtel® HSP56 (1789)
interface.
Being compatible with DirectSound™ 3D, CMI8738 meets PC99® requirements, and supports professional
digital audio interface such as 16-bit SPDIF IN (0.5V ~ 5V)and OUT(44.1K and 48K format).
CMI8738 uses HRTF 3D extension technology to enhance traditional HRTF 3D positional audio by substituting
two-speaker system by four or six - speaker one (it supports additional 2 ch 16-bit DAC to provide rear side
audio and another 2 ch for subwoofer/Center). It greatly improves HRTF 3D positional audio quality and
successfully removes the sweet spot limitations: users can enjoy genuine 3D audio gaming effects, and don't
have to worry about the environmental confinement any more.
Being outstanding for its full audio functions, competitive price, and power management, CMI-8738 is the
best choice for people seeking for optimum use of the PC applications.
2. Features
 6CH DAC for AC3® 5.1CH purpose.
 HRTF-based 3D positional audio, supporting DirectSound™ 3D interface
 Supports 4.1/5.1 speakers, C3DX positional audio in 4 / 6 CH speaker mode
 Legacy audio SBPRO™ compatible
 DLS-based wavetable music synthesizer, supports DirectMusic™
 Professional digital audio interface supporting 24-bit SPDIF IN and OUT (44.1K and 48K format)
 Built-in 32ohm Earphone buffer
 Drivers support EAX® , Karaoke Key, Echo…
 MPU-401 port/ Dual game port
 16-bit full duplex CODEC
 Built-in ZV port
 32-bit PCI bus master
 External E²PROM interface
 Single chip design, digital power +3.3V, analog power +5V, 128 pins QFP
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