

Therefore, adding this tone to a C Major triad creates a Major 7th chord. Since this note naturally exists in the Major key, it's referred to as a Major 7th. As you can see with the key of C Major, the 7th tone is B. The best way to approach the explanation of 7th chords is to look at the numbered tones of a Major key of music. This can be confusing if you're more at the beginner level of learning. In case you're not familiar, there are two different types of 7th chords. One such thing that's recently come to my attention is the concept of 7th chords. More often then not, I make the mistake of assuming that aspiring piano players just know certain things about music.
