Using for CMI8738 5.1 multi‑channel audio chip, compatible for DirectSound 3D and EAX audio effects. 6-channel surround sound output, support front left/right, surround left/right, center/subwoofer, S/PDIF-Out interface. Has the function of eliminating noise balance when turning off or turning on the computer. Provide surround sound field and clear sound quality, suitable for home theater, large-scale 3D games, enjoy music and other entertainment. Supports PC computer systems with PCI‑Express slots such as for Windows 7/Vista/XP 32/64‑bit.