This sound card adopts For ESS chip Support 4. channel surround sound output, support For DLS sound library technology, support for A3D 1.0 and DS3D, compatible with for DirectSound 3D and EAX sound effects. Supports For 24-bit SPDIF OUT and SPDIF IN at the same time, and also supports optical fiber input and output through daughter cards The signal-to-noise ratio of the chip reaches 120dB, PCI plug and play bus interface -full duplex playback and recording -for HRTF 3D spatial positioning sound effect, support for Dircet Sound 3D and A3D interface Wide range of operating system platforms, support for MSDOS, for WINDOWS3X, for 9X, for NT, for WIN2000, for LINUX and other platforms -MPU-401 GAME/MIDI port and surround sound SB 16 support -Downloadable wavetable synthesizer CRL 3D sound technology Support 3D interface for Microsoft D3D and Aureatr Support two/four speakers and DLS Support wave table music synthesizer Compatible with traditional sound cards