Interval Recognition: Minor, Diminished, and Augmented
Introduction
While perfect and major intervals sound stable and bright, minor, diminished, and augmented intervals add tension, drama, and emotional complexity to music. Recognizing these intervals by ear opens up the full spectrum of musical expression.
Minor Intervals
Minor intervals have a darker, sadder quality compared to their major counterparts.
Minor Second (m2)
- One semitone apart.
- Song example: “Jaws” theme.
- Sound: tense, dissonant, suspenseful.
Minor Third (m3)
- Three semitones apart.
- Song example: “Greensleeves” (first two notes).
- Sound: sad, melancholic, minor.
Minor Sixth (m8)
- Eight semitones apart.
- Song example: “The Entertainer” (first two notes).
- Sound: bittersweet, yearning.
Minor Seventh (m7)
- Ten semitones apart.
- Song example: “Somewhere” from West Side Story.
- Sound: unresolved, longing, jazzy.
Diminished Intervals
Diminished intervals are smaller than perfect intervals by a semitone, creating strong tension.
Diminished Fifth (Tritone)
- Six semitones apart.
- Song example: “The Simpsons” theme.
- Sound: unstable, dissonant, “devil’s interval.”
Diminished Octave
- Eleven semitones apart (one semitone less than octave).
- Sound: extremely tense, wants to resolve inward.
Augmented Intervals
Augmented intervals are larger than perfect intervals by a semitone, creating an expansive, reaching quality.
Augmented Fourth (Tritone)
- Six semitones apart (same pitch as diminished fifth).
- Song example: “Maria” from West Side Story.
- Sound: bright tension, longing to resolve.
Augmented Fifth
- Eight semitones apart.
- Sound: dreamy, unsettled, augmented chord quality.
The Tritone
The tritone (augmented fourth / diminished fifth) deserves special attention. It divides the octave exactly in half and has been feared and revered throughout music history. It is the most unstable interval and strongly wants to resolve inward (to a third) or outward (to a sixth).
Practice Strategy
- Learn the reference songs for each interval.
- Practice singing from a reference note to the target interval.
- Listen to chord progressions and identify the intervals within them.
- Mix perfect/major and minor/diminished/augmented in random drills.
Conclusion
Minor, diminished, and augmented intervals are the spice of music. They add tension, color, and emotional depth. With practice, you will recognize them instantly — and your musical understanding will deepen immeasurably.