A♯ 7♭5 on E9 pedal steel
A♯ 7♭5 = A♯ · D · E · G♯ (root, 3rd, ♭5/♯11, 7th). 402 playable voicings on the standard E9 copedent — the best 12 by neck position below.
Low neck (frets 0–7)
Fret 5 · B + LKLB raises strings 3 & 6 a half step (G♯→A)LKL raises strings 4 & 8 a half step (E→F)Fret 7 · B + C + LKLB raises strings 3 & 6 a half step (G♯→A)C raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)LKL raises strings 4 & 8 a half step (E→F)Fret 2 · A + LKR + RKRA raises strings 5 & 10 a whole step (B→C♯)LKR lowers strings 4 & 8 a half step (E→D♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 1 · B + C + LKLB raises strings 3 & 6 a half step (G♯→A)C raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)LKL raises strings 4 & 8 a half step (E→F)
Mid neck (frets 5–12)
Fret 8 · A + LKR + RKRA raises strings 5 & 10 a whole step (B→C♯)LKR lowers strings 4 & 8 a half step (E→D♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 11 · B + LKLB raises strings 3 & 6 a half step (G♯→A)LKL raises strings 4 & 8 a half step (E→F)Fret 6 · RKRRKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 6 · LKL + RKRLKL raises strings 4 & 8 a half step (E→F)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)
High neck (frets 10–17)
Fret 13 · B + C + LKLB raises strings 3 & 6 a half step (G♯→A)C raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)LKL raises strings 4 & 8 a half step (E→F)Fret 14 · A + LKR + RKRA raises strings 5 & 10 a whole step (B→C♯)LKR lowers strings 4 & 8 a half step (E→D♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 17 · B + LKLB raises strings 3 & 6 a half step (G♯→A)LKL raises strings 4 & 8 a half step (E→F)Fret 12 · RKRRKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)