The xonar dgx audio card combines dolby headphone 51 high definition surround with the asus exclusive gx 25 gaming audio engine and an on board headphone amplifier these result in accurate and deep audio that brings every nuance and sound across fully making the xonar dgx 51 an ideal audio card for gamers who want to remain totally aware of their play environments audiosignal to noise ratio105dbsampling ratesup to 96khzother audio featuressmart volume normalizer bull xear 3d virtual spea