Samsung P55 - Manual (Page 65)

6
Setting the Sound to Digital Sound Output on the Computer
Since the sound of the computer is set to Digital Output by default when purchasing the computer, additional settings are
not required. You can confirm the setting as follows.
1
Double-click the Volume Control ( ) icon in the notification area of the Taskbar and select Options > Advanced
Controls.
2
Click the Advanced button below the Master Volume and check if the 1 Disable Digital Output item is unselected.
The option must be unselected for sound to be output in digital format.