Features 1、This sound card uses CMI/HT8738 chip. The chip's signal‑to‑noise ratio reaches 120dB, PCI plug‑and‑play interface‑full duplex playback and recording‑HRTF 3D spatial positioning sound effects, supports dircet sound 3D and A3D interfaces. 2、Support for Windows 98 / for Windows2000 / XP / NT signal voltage (0.5V~5V). 3、Support 4‑channel surround sound output, support DLS sound library technology, support A3D 1.0 and DS3D, compatible with DirectSound 3D and EAX sound effects. Supports 24‑bit SPDIF, OUT and SPDIF IN at the same time, and supports optical fiber input and output through a daughter card. 4、This card supports music synthesizer, traditional sound card, and supportsfull duplex playback and recording. 5、Support Direct Music ‑SPDIF digital audio indicators: 24‑bit stereo, 44KHzsound sampling recording and playback, 120dB sound quality full duplex playback recording. Specification Item Type: Sound card Signal‑to‑Noise Ratio: 120dB Package List 1 x Sound Card 1 x Optical Disc