C7b5 Dominant 7th
The C7b5 chord is built from the notes C – E – Gb – Bb.
Piano sound loads on first tap.
Also known as
C7(b5)Calt7b5
Chord tones, one by one
CRoot
Root
The fundamental note the chord is built on — C.
EThird
Major third
Four semitones — makes the chord major (brighter, happier).
GbFifth
Diminished fifth (♭5)
Six semitones — a flat fifth. Creates instability, typical of m7♭5 and diminished chords.
BbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
🎼 Related scales
Lydian dominant (acoustic)melodic minor a perfect 4th below
🎹 Modal analysis
This chord implies the Lydian dominant (acoustic) scale; its characteristic note is the ♯11 over a ♭7 (the acoustic sound). It is a mode of the melodic minor a perfect 4th below.
🎸 Genres
Jazz fusion · Modal jazz · Bossa/MPB