When WIDA testing, plug in headphones prior to opening the DRC application. A box will appear on the screen asking which device was plugged in. Select the option "Headset" like so:
If you select the wrong option, you can always unplug and replug the headphones to bring up the prompt again.
If the popup prompt does not show
Press the Windows key and type "maxx" click the first option which should be MaxxAudioPro
Once in the application select the Playback option, like so:
Click the advanced tab, and select "Show pop-up dialog when the device is connected"
Unplug the headphones and replug them, and they should pop-up with that dialog again.
If headset has been selected from popup and sound comes out of speakers
Click the speaker icon in the lower right corner. Select Speakers / Headphones.