C Augmented 7th
Caug7 · Root
Every chord tone stacked from the root up.
Click keys to experiment with the chord
C – E – G♯ – B♭
1 – 3 – #5 – b7
This augmented dominant has the same notes as 7#5 and often functions as a V chord resolving down a fifth. The whole-tone scale is one common sound; the root may be omitted in piano voicings when a bassist supplies it, and +7 is another notation.
The Caug7 chord sounds distinctive, with a augmented 7th character. Its notes are C, E, G#, Bb. This chord is commonly heard in jazz.