Building blocks of chords, intervals

We will discuss note pairs that are called interval in this post.

 

If we take the piano keys as our basis, all of the consecutive keys are half tone apart from each other. Consecutive 2 keys are a whole tone apart from each other. According to this rule E – F and B – C notes are half tone apart from each other.

If we think about all major scales based on the Roman Numerical System, III-IV and VII-VIII are half tone apart while the rest of the white keys are a whole tone apart.

Note pairs below are listed and named as intervals.

Chords are built based on these intervals. The chords that we call triads, consist of root 3rd and the perfect fifth. Depending on the 3rd degree chord is named as major or minor.

Chords above are C major and C minor triads. The list of the chords that are frequently used in jazz are listed below.