The Xonar HDAV1.3 Slim PCI Sound Card from ASUS is a PCI expansion card, designed to pass video and audio through its HDMI output to an HDTV or surround sound receiver. The card outputs the video and audio from your computer's Blu-ray drive via HDMI in its pure digital form. It supports all standard surround sound formats, as well as 24p video. It features a low-profile design, with brackets included for installation in both standard and slim computer chassis.