The audio port on the DP1310 only receives audio from the USB-C IN port, which connects to your laptop. If there's no sound from 3.5mm audio devices (e.g., headphones or headsets) connected to the DP1310's audio port, try the following:
- Audio for HDMI 2.1 IN port
   If you want to receive audio from the HDMI 2.1 IN port, which usually 
   connects to your PC or gaming consoles, use the monitor's built-in speaker or 
   connect your audio device to the monitor instead.
- Audio for USB-C IN port
   Ensure that the audio output source on your laptop is set to BenQ DP1310 
   Audio.
> Windows: click the sound icon in the toolbar and choose BenQ DP1310 
    Audio in the drop-down menu.
> macOS: click the Control Center icon in the menu bar and select Sound.
    Choose BenQ DP1310 Audio as the audio output.