Dell C2722DE 27" 16:9 IPS Video Conferencing Monitor - Manual (Page 101)

Operating the monitor | 101
Setting up the monitor speaker as default setting
When your computer connects multiple speakers, if you want to set up the monitor
speaker as default setting, please follow below instructions:
Right-click
Volume in the Windows task bar notification area.
Click Playback devices enter to Sound setting interface.
If only the HDMI or DP cable is connected from your monitor to the computer, only one
speaker named
DELL C2422HE/C2722DE/C3422WE from the monitor will show in
the Sound setting interface.