ASUS" Xonar Essence ST audio card with world"s first precision audio clock tuning offers a revolutionary listening experience. In its search for the purest essence of sound, ASUS have broken the boundaries with the soundcard on the market, the Xonar Essence ST. This PCI card is the world"s first audio card to incorporate precision clock tuning to minimize audio jitter, bringing the user a clearer, crisper listening experience. The Xonar Essence ST is capable of achieving an industry-leading 124dB SNR (Signal-to-Noise Ratio) in signal clarity and offers a built-in headphone amplifier to obtain the best performance out of any available pair of headphones. Thanks to ASUS" exclusive Hyper-grounding and EMI Shield design, even the most demanding audiophile will be satisfied with the unprecedented sound quality. Specifications - Device Type - Sound card Enclosure Type - Plug-in card Interface Type - PCI Signal Processor - ASUS AV100 Sound Output Mode - Stereo DAC Data Width - 24-bit Sample Rate - 44.1 kHz (min) - 192 kHz (max) Signal-To-Noise Ratio - 124 dB Response Bandwidth - 10 - 90000 Hz Features - Karaoke, built-in Dolby Pro Logic II decoder, Dolby Headphone technology, Dolby Virtual Speaker technology, Magic Voice, Smart Volume Normalizer, FlexBass, Xear 3D Virtual Speaker Shifter, VocalFX Compliant Standards - DirectSound, A3D 1.0, OpenAL, Dolby Digital Live, Dolby Virtual Speaker, Dolby Headphone, DirectSound3D GX 2.5, Dolby Pro Logic II Audio Modes - Playback - 24-bit 192 kHz - 124 dB; Record - 24-bit 192 kHz - 118 dB Interfaces - 1 x audio - line-out - RCA x 2, 1 x headphones - output, 1 x audio - line-in/microphone, 1 x audio - line-in - 4 pin MPC, 1 x audio - SPDIF output - RCA Compatible Slots - 1 x PCI Operation System - Windows Vista/XP(32/64bit)/MCE2005