A#/B♭ 7th ♭9th chords Author: Juan Martinez Categories: A♯ Chords Tags: 7th ♭9th A# 7 b9 piano chord Formula: 1 – 3 – 5 – ♭7 – ♭9 Example: A# – D – F – G# – B Chord Suffix: A#7♭9 Use these charts to create your own A# 7th ♭9th chord or play a A# 7th ♭9th melody. A# 7 b9 piano chordA# 7th b9th guitar chord