...are key (haha) to your understanding of fundamentals of Western European music theory. They help us to organize the diatonic scales you will learn about in the scale pages, and often make it easier for us to sight read music.

There are 15 different Major key signatures (6 of which make enharmonic pairs). You want to be able to identify them quickly by sight, whether that means you memorize the number of sharps or flats in each key signature or you use the rules that I demonstrate in the video below. When you feel ready, take the quiz at the bottom of the page.