I have the same issue as you with mic and sound on my brand new macbook air. It seems restarting fixes the issue for a few hours so it might be a software issue

I have the same issue as you with mic and sound on my brand new macbook air. It seems restarting fixes the issue for a few hours so it might be a software issue but regardless it'a. huge problem for me... Unfortunately my trusty 2013 mbp died so had to buy that as a replacement (I used to replace my laptop for the top of the line apple laptop every 3 years but didn't in this case due to the keyboard)