The Realtek HD Audio Manager control screens
Digital Output: Enables you to select the Environment and Equalizer settings. You can select an environment, such as Stone Room or Auditorium. Under Equalizer, you can either click a preset button, such as Pop or Live, or manually adjust the settings and then save them for easy selection later.
Speakers: Enables you to select the number of speakers, view whether the connectors are analog or digital, and select the digital audio output and digital audio input devices. Only speakers that are currently being used are displayed.
Configuring Speaker and Sound Options 73