A 7♭5 Chord

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