Any 2nd, 3rd, 6th or 7th interval where the upper note appears in the scale of the lower note
Major
A major interval that’s been made a semitone smaller
Minor interval
A major interval made 2 semitones smaller
Diminished
A major interval made a semitone larger
Augmented
of half steps in a Maj 2nd
2
of steps in a min 3rd
3
of steps in a major 3rd
4
of half steps in a perfect 4th
5
of half steps in a diminished 5th or Aug 4th
6
of half steps in a minor 6th
8
of half steps in a Major 6th
9
of half steps in a minor 7th
10
of half steps in a Major 7th
11
of half steps in a perfect 8 octave
12