Transforms your PC into a home theater system with multi-channel surround sound Experience the latest in digital 5.1-channel surround sound for the latest DVD's, games, & music Customize internet audio with the power and surround sound of EAX audio technologies Fully compliant with Sound Blaster, Sound Blaster Pro and DirectSound Conforms to PCI specification, revision 2.2 and PC99 specification Supports multi-channel music, games and DVDs on 2, 4, 6 (5.1) speaker systems 6CH DAC for AC3 5.1-channel purpose HRTF-based 3D positional audio, DirectSound 3D and A3D to support the latest 3D positional audio DLS-based wavetable music synthesizer, supports DirectMusic MPU-401 compatible MIDI interface and built-in dual game port. MIDI/Game port not supported in Windows Vista 32-bit and Vista 64-bit16-bit full duplex CODEC Fully compliant with Sound Blaster, Sound Blaster Pro and DirectSound and supports EAX, karaoke key, echo... sound effects RoHS compliant Frequency Response: 20Hz to 20KHz S/N Ratio: 68.5dB Crosstalk: -65.7dB THD (%): 0.092 THD + Noise: 0.124dB