Realtek High Definition Audio XP software (version 2.74 XP) is a driver package for Windows XP computers that includes for Realtek audio chips. The software allows s to adjust the sound settings on their computers, including the volume, bass, and treble. It also includes a variety of audio effects and enhancements, such as karaoke mode and 3D sound. The software is compatible with a wide range of audio devices and s multiple channels for surround sound systems.