With high speed PCI V2.1 bus controller and legacy audio 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.

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