Well take it from me, spacebar might not unmute after you have done something "fancy." (I use Windows 10, and I get boxes telling me to use the spacebar to unmute.) I have sensitive hearing, and I have to adjust my computer's volume a lot. That's one operation that affects the spacebar.

By the way, if you are speaking DO NOT SHOUT INTO A MICROPHONE. I have been hurt so many times by people doing that. You'd be surprised how loud people get when exclaiming "Great!" or giving a groan of embarrassment. There's one catter who hurt me so bad that I am never going to listen to him again. When it's his turn, I turn my volume down to 0.