Very good sound via analog out. Run kHz sampling scale and all the EQ of the Hi-fi fashion. 50% by volume in the mixer, % in the main giving an internal. ASUS Xonar D2X - sound card overview and full product specs on CNET. Asus Xonar D2X is the world's first PCI-E interface high end audio card featuring SNR up to dB. Xonar D2 provides intuitive DS3D GX to solve Vista gaming.