C 7♭5 Chord

C 7♭5 is built from the notes C, E, G♭, B♭. The interval from C to E is a major 3rd (4 semitones), from C to G♭ is a tritone (6 semitones), from C to B♭ is a minor 7th (10 semitones). This chord contains 2 flatted notes.