Features
6CH DAC for AC3 5.1CH purpose
HRTF-based 3D positional audio, supporting DirectSound 3D and A3D 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 
Built-in PCtel HSP56 Modem interface 
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 E?PROM interface 
Single chip design, digital power +3.3V, analog power +5V, 128 pins QFP