The next interval we will learn about is called a Minor 3rd.
As we learned in previous lessons, an interval is called “Minor” if it is one half step smaller than a Major interval.
Therefore, to understand Minor 3rds, we must first understand Major 3rds.
In the key of C, a Major 3rd is the interval from C to E.
We call this a “Flat 3rd” written “b3”.
This is because it is part of the major scale, which is Whole Whole Half, Whole Whole Whole Half.
A Minor Third is also equal to three half steps.