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The Compound Intervals Cheat Sheet

Simple Interval Compound Interval
m2 m9
M2 M9
m3 m10
M3 M10
P4 P11
A4 A11
d5 d12
P5 P12
m6 m13
M6 M13
m7 m14
M7 M14
P8 P15

Formula: identify the simple interval and add 7 (i.e. m2 = m9)