SIIG DP SoundWave 5.1 PCIe Optical Out (IC-510111-S2) Upgrade to digital 5.1 surround sound on PCI Express enabled desktop systems S/PDIF optical output provides true 5.1-ch sound ( Requires DVD playback software, S/PDIF decoder, Toslink fiber optic cable and 5.1-ch speakers) High-definition 5.1 channel surround sound transforms your PC into a home theater system Perfect audio upgrade for DVD playback, MP3 or other music, gaming, and more! Reduces unwanted static and noises from D/A processing Dual profile design to work in standard height and low profile chassis with the included brackets Supports Dolby Digital EX and DTS ES 5.1 CH Supports DirectSound 3 hardware acceleration