Therefore, when it is uninstalled, you face severe audio errors. This makes the driver essential for the audio device to work. Realtek High Definition Audio Driver is a common Sound driver for Windows PC, and it helps manage surround sound, Dolby, and DTS sound systems. What Happens When Realtek High Definition Audio Is Outdated? You can also use it to adjust the volume for each speaker individually. Once an audio device is connected using Realtek Audio Console, you can adjust the microphone and speaker setting as it picks the audio configuration. Also known as Realtek Audio Control, it is an interface that helps adjust audio device effects and all the audio device settings.