VERY VERY VERY BASIC! (And slightly rushed) This is for some very specific people (you know who you are) IMPORTANT!!!!! IF IT DOESN'T WORK: - Click see inside - Scroll down to the sensing blocks (light blue) - Click on the "loudness" reporter block - If it says "0" or "-1," your microphone may not be allowed! Try allowing Scratch to use your microphone and refreshing the page. IF IT STILL DOESN'T WORK, YOU MAY NEED TO RE-CALCULATE THE NOISE THRESHOLD! (And if it still STILL doesn't work, the room may be too loud for you to use it. Maybe try talking louder into the microphone or going to a quieter location?) Comments inside to explain the code! I may unshare this later and add more/improve the code.
Credit to Eternatus