The minor add4 chord adds a perfect fourth to a minor triad: 1-♭3-4-5. Its identity comes from the coexistence of minor third and fourth, which creates a close, expressive friction. It can feel like a suspended color leaning back toward minor, making it useful when you want minor harmony with added modal openness.
Construction
Start with a minor triad and add scale degree 4. In Cm(add4), a typical set is C-E♭-F-G. Because ♭3 and 4 are adjacent, spacing decisions strongly affect whether the chord sounds lyrical or harsh.
Sound Character
The color is intimate, slightly tense, and modal. Compared with plain minor, it sounds less final; compared with sus chords, it keeps clearer minor identity.
Usage
Common in modern songwriting, indie/folk-influenced harmony, jazz reharmonization, and cinematic textures where minor harmony should remain open rather than fully resolved.
Examples
- Minor loop progressions with occasional add4 color hits
- Guitar voicings emphasizing quartal/mixed-tertian texture
- Film cues that need gentle instability without dominant pull
Play
Use open voicings, separate ♭3 and 4 by register, and omit 5 if density builds up. On piano and guitar, octave displacement often makes the chord speak more clearly.
Harmonic behavior
Minor(add4) often acts as a local color variant of i or iv rather than a strict functional chord class. Releasing 4 to ♭3, or keeping 4 as melodic tension above minor support, creates expressive motion.
Ear-training cues
Listen for a minor core with a nearby fourth rub. Compare minor triad versus minor(add4) to lock in the extra modal tension.
