Another tip is, in RB, if you see the meters moving, but no audio on that track. Look at the track output and read what it says. You may need to select the proper port again. Right click on that track and choose the output that works.

This happened to me after I had upgraded from 2015 to 2016. For what ever reason, it was set to RealeTek, instead of MS Mapper.

Look at me, a newbie and giving tips already.. lol