Intervals · 12-23 half steps

HS = half steps
12 HS
perfect octave (8)

13 HS
minor ninth (b9)
augmented octave (#8)

14 HS
major ninth (9)

15 HS
augmented ninth (#9)
minor tenth (b10 = 8 + b3)

16 HS
major tenth (10 = 8 + 3)
diminished eleventh (b11)

17 HS
perfect eleventh (11)

18 HS
augmented eleventh (#11)
diminished twelfth (b12 = 8 + b5)

19 HS
perfect twelfth (12 = 8 + 5)

20 HS
minor thirteenth (b13)
augmented twelfth (#12 = 8 + #5)

21 HS
major thirteenth (13)

22 HS
minor fourteenth (b14 = 8 + b7)
augmented thirteenth (#13 = 8 + #6)

23 HS
major fourteenth (14 = 8 + j7)
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