ANNOTATING INTERVALS

Often, intervals are annotated using abbreviations. Abbreviations for intervals consist of a single letter in uppercase or lowercase that corresponds to the interval quality and a number which corresponds to the interval number. For instance, a perfect fifth is annotated as P5 where the uppercase letter P corresponds to "perfect" and the number 5 corresponds to "fifth".

The following shows the uppercase and lowercase letters that are used when annotating intervals:

• P = perfect interval quality 

• d = diminished interval quality

• A = augmented interval quality

• m = minor interval quality

• M = major interval quality 

The following shows the numbers that are used when annotating intervals:

• 1 = prime

• 2 = second

• 3 = third

• 4 = fourth

• 5 = fifth

• 6 = sixth

• 7 = seventh

• 8 = octave