User blog comment:Starscream7/Sign up to be a voice or write screenplay in BIONICLE: Reality!/@comment-957879-20100901022102/@comment-3028754-20100901121929

Your computer should have a built in one. If you have a laptop or a Mac, they DEFINETLY have built-in mics. Also, Rock Band mics have USB ports that can get plugged into your computer.