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Xonar U1 transcodes any stereo source into Dolby Headphone, Virtual Speaker, and 5.1-channel Dolby Digital & Pro-Logic II surround sound. It also supports DirectSound, EAX, OpenAL for best gaming in Windows Vista and XP.
Xonar U1’s built-in high-fidelity headphone amplifier achieves best listening quality with most stereo headphones
The bundled advanced Array MIC technology can suppress ambient noises for up-to-20 dB, leaving only front-side clear voice for VOIP applications (Skype, MSN, Google, QQ, etc.) or online gaming.