ASUS All-in-One PC A4310521. From the Start screen, launch the Desktop Mode.NOTE: For more details, refer to the section Start screen under UsingWindows® 8.1.2. Right-click the Volume Mixer icon on the Windows® taskbar andclick Playback devices.3. From the Playback screen, select Digital Audio (HDMI).4. Click Configure and the Speaker Setup window pops up.Setting up a secondary display viathe HDMI-output portIf you want to use a high-definition TV as an audio output device, followthe steps below to configure the audio settings.To configure the audio output via an HDMI device: