B 7 on E9 pedal steel
B 7 = B · D♯ · F♯ · A (root, 3rd, 5th, 7th). 1334 playable voicings on the standard E9 copedent — the best 12 by neck position below.
Low neck (frets 0–7)
Fret 7 · RKLRKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)Fret 6 · B + LKLB raises strings 3 & 6 a half step (G♯→A)LKL raises strings 4 & 8 a half step (E→F)Fret 3 · A + RKRA raises strings 5 & 10 a whole step (B→C♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 3 · C + RKRC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)
Mid neck (frets 5–12)
Fret 6 · B + C + RKRB 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♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 6 · B + C + LKRB 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♯)LKR lowers strings 4 & 8 a half step (E→D♯)Fret 10 · LKL + RKLLKL raises strings 4 & 8 a half step (E→F)RKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)Fret 12 · B + LKRB raises strings 3 & 6 a half step (G♯→A)LKR lowers strings 4 & 8 a half step (E→D♯)
High neck (frets 10–17)
Fret 13 · LKR + RKRLKR 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 15 · A + RKRA raises strings 5 & 10 a whole step (B→C♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 15 · C + RKRC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)RKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 14 · 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)