Ver. 1.2
CMI-8738/PCI-SX AUDIO Specification
Preliminary
Ver 1.2
CMI-8738/PCI-SX
C3DX PCI-Based HRTF 3D Extension Positional Audio Chip
With high speed PCI V2.1 bus controller and legacy audio
Features
HRTF-based 3D positional audio,
supporting
DirectSound™ 3D
and
A3D™
interface
Supports rear side speakers, C3DX
positional audio in
4 CH speaker
mode
Legacy audio
SBPro™
compatible
DLS-based
wavetable music synthesizer,
supports DirectMusic™
Built-in 32ohm Earphone buffer
Drivers support EAX™, Karaoke Echo, Key
Surround sound
MPU-401 port
Dual game port
16-bit full duplex CODEC
4 CH 16-bit DAC
32-bit
PCI bus
master
External E²PROM interface
Single chip
design, +5V, 128 pins QFP
SB16® 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 – SB16™, FM
emulator/DLS wavetable music synthesis, and HRTF 3D
positional audio functions.
Being compatible with A3D™ and DirectSound™ 3D, CMI8738
meets PC99 requirements
CMI8738 uses HRTF 3D extension technology to enhance
traditional HRTF 3D positional audio by
substituting two-speaker
system by four- speaker one
(it supports additional 2CH 16-bit
DAC to provide rear side audio). 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.
C-Media licensed HRTF 3D library from
Central Research
Lab (CRL ), U.K,
who provides one of the world's best HRTF
libraries
®
®
CMI-8738/PCI Block Diagram
14.318Mhz
PCI BUS
PCI interface
DMA engine
IRQ control
Earphone
buffer
LINE
OUT
MPU 401 and
GAME port
Legacy audio
SB16™emulator
16-bit CODEC
3D
Surround
Rear
L/R
MIC IN
PLL and
timing circuit
Music Synthesizer
HRTF DSP engine
Analog Mixer
MIC AMP
LINE / CD /
AUX / PCPSK
IN
C-MEDIA ELECTRONICS INC. Tel:886-2-87731100
Fax:886-2-87732211
URL : www.cmedia.com.tw
Products and company names mentioned here are the trademarks of their respective owners.
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CMEDIA [ C-MEDIA ELECTRONICS ]
