Hi Duo Team,
I am getting error msg while making video call using my Android TV via Google Duo saying your Microphone isn’t working, try closing other application and try again. 
I did contact Sony TV Support and they said please contact Google Duo team as it’s 3rd party application. 
Can you please help me to resolve this issue as my camera is working perfectly fine and I am able to make video call using Duo, only issue with microphone connection.
 
Thanks