Universal Intervals

0 Keys: Unison: Just one note

1 Key: Half, Half Tone, Half Step, Semi-tone

2 keys: Whole, Whole Tone, Whole Step

3 Keys: Fat Tone, Minor 3rd, Augmented 2nd

4 Keys: Bitone, Major 3rd, Diminished 4th

5 Keys: 4th, rarely spelled any other way

6 Keys: Tritone, Double Fat, Augmented 4th, Diminished 3rd

7 Keys: 5th, rarely spelled any other way

8 Keys: Quad, Double Bitone, Minor 6th, Augmented 5th

9 Keys: 3-Fat, Major 6th, Diminished 7th

10 Keys: b7 or Regular 7, Two Short, Augmented 6th

11 Keys: Maj7, One Short, Diminished Octave

12: Octave

No video should be necessary for this interval.

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