What major key contains 1 flat?

The major key that contains 1 flat is F Major. This key signature consists of only one flat, which is B flat. Understanding the circle of fifths or the order of sharps and flats can help in identifying the key signatures for different major keys.

In the case of F Major, when you look at the scale that comprises the notes F, G, A, B flat, C, D, and E, you can clearly see the presence of one flat note. Each of the other options has a different number of sharps or flats associated with them. C Major has no sharps or flats, D Major has two sharps, and B Major has five sharps. This foundational knowledge about key signatures is crucial for musicians as it aids in reading music, knowing scales, and understanding harmonic progressions.