The number of a compound interval is always 7 more than its related simple interval with the same letter name.
See how the common intervals are in the bass clef and the compound intervals are in the treble clef.
The only compound intervals appear where, for example, a second is considered dissonant whereas its compound form as a ninth, or its inversion as a seventh, is considered consonant.
Perfect fifth added to perfect fifth makes major ninth which is a compound interval of major second.
The names of the compound intervals are those of the simple intervals plus the number seven.
Definition of compound interval in US English:
compound interval
noun
Music
An interval greater than an octave.
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Example sentencesExamples
See how the common intervals are in the bass clef and the compound intervals are in the treble clef.
The names of the compound intervals are those of the simple intervals plus the number seven.
The only compound intervals appear where, for example, a second is considered dissonant whereas its compound form as a ninth, or its inversion as a seventh, is considered consonant.
Perfect fifth added to perfect fifth makes major ninth which is a compound interval of major second.
The number of a compound interval is always 7 more than its related simple interval with the same letter name.