Abadd15 Major
The Abadd15 chord is built from the notes Ab – C – Eb – Ab.
Piano sound loads on first tap.
Chord tones, one by one
AbRoot
Root
The fundamental note the chord is built on — Ab.
CThird
Major third
Four semitones — makes the chord major (brighter, happier).
EbFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
AbExtension
Extension (24 st)
An upper extension 24 semitones above the root.
🎼 Related scales
🎹 Modal analysis
This chord implies the Ionian (major) scale; its characteristic note is the perfect 4th, what sets it apart from Lydian.
🎸 Genres
Pop · Classical · Gospel