ASUS XONARU1BLK U1 Audio Station - Black DirectSound3D Game Extensions 1.0/DirectX DS3D GX 1.0 supports EAX gaming sound effects and DirectSound 3D hardware enhanced functions on Windows Vista. (DirectX/DirectSound 3D compatible) Smart Volume Normalizer - Normalizes the volume of all audio sources into a constant level and also enhances your 3D sound listening range and advantages in gaming Magic Voice - Modifies the sound of your voice, for VOIP and online chat applications Karaoke Functions - Music Key-Shifting and Microphone Echo effects