Allytech PCI Express Pci-e 5.1ch 6channels Digital Cmi8738 32-bit 3D Audio Sound Card SFF System interface: 32-bit PCI express x1 Bus Master Provides audio fidelity that rivals movie theaters with 4\6-channel digital sound Customize Internet audio with the power and surround sound of EAX audio technology Enjoy compelling 3D audio and 4-channel sound on multiple speaker series HRTF-base 3D positional audio, supporting DirectSound 3D, EAX and A3D interfaces