Music Fundamentals A Balanced Approach

To identify the quality of a compound interval, bring the upper note down an octave while retaining the lower
note. Doing so does not change the quality of the interval.

Notice:

• The compound interval and its corresponding simple interval share the same quality.


• Although we are moving the upper note down an octave (eight notes) we will subtract seven from the
  compound interval to get the comparable simple interval.


• You may also move the lower note upanoctave while retaining the upper note.

Exercise 21

Draw the simple interval by moving the upper note of the compound interval down an octave (or moving the
lower note up an octave). Identify the compound interval and its comparable simple interval.
Example: In the first answer, the upper G is moved down an octave; in the second answer, the lower E is
moved up an octave. Notice that the resulting notes in both answers are the same (E to G); they are only written
in different octaves. Example:

274

MODULE 10

M9 M2 P11 P4 m10 m3

OR

m10 m3 m10 m3

Example 1. 2.

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