So in the game, If I wanted my mic to work, the chat audio had to come out of my speakers, while the game audio went to my headset. when I select 'Headphone/Digital Output(Realtek High Definition Audio) as the OUTPUT - the microphone STOPS WORKING.in the recording device settings in windows - I can clearly see the levels moving when I speak into the mic, and I can hear myself when I select “Listen to this device” - so the microphone is working perfectly in windows for all purposes.in battle net > game settings > voice chat, if I select 'DELL S2417G(High Definition Audio Device) - then “test microphone” WORKS - I see my audio when i speak.unchecking “allow application exclusive control” under the advanced tab of properties for both the playback and recording device.setting my headphones as “default communications device” setting microphone as “default communications device” and selecting “comms devices” within overwatch.setting my headphones as “default device” setting microphone as “default device”.Things I did try - mentioned by the moderators and repeated everywhere as common solutions: For what its worth, I spent a while figuring out this issue and my solution is different from every elses, so im putting it here in case it might help someone in the future.

Change default microphone windows 10