The minor third (m3) is one of the most characteristic intervals in tonal harmony. It spans 3 semitones and gives minor chords their darker, warmer color.
Construction and spelling
m3 runs from a note to its third letter name, such as C to E♭, D to F, or A to C. It belongs to the major/minor interval family. Proper spelling is essential to show minor quality and harmonic function clearly.
Harmonic and melodic usage
Harmonically, m3 defines the quality of minor triads and many minor seventh sonorities. Melodically, it sounds expressive and slightly inward, common in lyrical and modal lines. In voice leading, m3 provides smooth links between related chord tones.
Examples
- Minor triads built from root, minor third, and perfect fifth
- Melodic motifs emphasizing minor tonal center
- Arpeggiated minor lines in pop, jazz, and film music
In practice
Practice m3 from different roots and sing it against drones to lock minor color and intonation. Compare m3 with M3 to internalize minor versus major quality. Strong m3 recognition improves chord hearing, melodic phrasing, and harmonic analysis.
