After setting up an Acer LCD ET2 Series monitor to a display port the sound setting did not detect the monitor audio output nor did I hear any audio.
The ET322QK specifications and manual states there are 2x2W speakers built into the monitor.
When looking at the Device Manager in Control Panel the monitor was detected as a Generic PnP Monitor not as Acer ET322QK.
The Generic PnP Monitor is not the correct driver and this is the reason why the monitor is not detected in the windows sound settings.
Product Name: Acer 32″ Class 4K UHD Free Sync Monitor
Model Name: ET322QK wmiipx
Part Number: UM.JE2AA.003
How to Enable Monitor Speakers
You will need to install the the driver from Acer’s website and then restart your computer for the driver to take affect and be detected correctly.
https://www.acer.com/ac/en/US/content/model/UM.JE2AA.003
https://www.acer.com/ac/en/US/content/support-product/7386?b=1
The Windows 8 driver is compatible with Windows 10 installation.
download the driver, you will see this list of files
how to install Windows Drivers MAnuall
In Device Manager right click the monitor and click properties
Then click Update Driver
Click Browse my computer for driver software and select the directory where you extracted the driver files.
Click Next and the driver will be installed.
After restarting your computer the Acer monitor should be available for output
Select Audio Output
Left Click the audio icon in the system tray to display the default selected audio device.
click arrow in top-right corner to display all available audio devices.
Then select Acer ET322QK
Click Manage sound devices
Press Test and will hear audio from your ET322QK speakers.