Interval · 12-23 Half Steps
HS = Half Steps
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)
23 HS
Major Fourteenth (14 = 8 + j7)
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Simple or Compound Interval
Simple intervals are intervals spanning at most one octave. Intervals spanning more than one octave are called compound intervals, as they can be obtained by adding one or more octaves to a simple interval.