How To: Figure out the key signature of a piece of music

Knowing music theory never hurt anyone—not Bach, not Chopin, not Schoenberg. Even if you fancy yourself a musical iconoclast, the better you know the rules of music, the better equipped you'll be to break them down the line. In this free video music theory lesson, you'll learn how to determine the root or "home" key of a song. For more information, including a very thorough overview, watch this helpful musician's guide.