About this chord (A♯m7(♭9, ♯11)):A♯ m7(♭9, ♯11) is a "eleventh" chord. A♯m7(♭9, ♯11)/C♯, A♯m7(♭9, ♯11)/F, A♯m7(♭9, ♯11)/G♯, A♯m7(♭9, ♯11)/B, A♯m7(♭9, ♯11)/E are the inversions of this chord."A♯" is the root of the chord and its major scale is A♯, B♯, C♯♯, D♯, E♯, F♯♯, G♯♯About m7(♭9, ♯11) chords:What's that chord again?1P 3m 5P 7m 9m 11A is the chord intervals formula for "m7(♭9, ♯11)" chords. The notation can also be simplified to 1 b3 5 b7 b9 #11.