Realtek HD Audio Drivers is a software package for Realtek High Definition audio codec. This will enable your computer to communicate with audio devices such as speakers and sound cards. It is important to have a 64-bit version of a Windows operating system installed in your computer before downloading Realtek HD Audio Drivers x64. Microsoft at times has shown a tendency to release new versions of whatever, without sufficient user acceptance testing, Like, for example, they will release a new version of Sharepoint or Dynamics AX that is not compatible with the latest versions of their own browsers.