D 7sus4 on E9 pedal steel
D 7sus4 = D · G · A · C (root, 11th, 5th, 7th). 1468 playable voicings on the standard E9 copedent — the best 12 by neck position below.
Low neck (frets 0–7)
Fret 4 · RKRRKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)Fret 6 · CC raises string 4 a whole step (E→F♯); raises string 5 a whole step (B→C♯)Fret 6 · AA raises strings 5 & 10 a whole step (B→C♯)Fret 3 · BB raises strings 3 & 6 a half step (G♯→A)
Mid neck (frets 5–12)
Fret 8 · RKLRKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)Fret 6 · A + LKRA raises strings 5 & 10 a whole step (B→C♯)LKR lowers strings 4 & 8 a half step (E→D♯)Fret 6 · C + LKRC 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 6 · LKR + RKLLKR lowers strings 4 & 8 a half step (E→D♯)RKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)
High neck (frets 10–17)
Fret 10 · B + RKLB raises strings 3 & 6 a half step (G♯→A)RKL lowers string 2 a half step (D♯→D); lowers string 9 a half step (D→C♯)Fret 11 · A + LKRA raises strings 5 & 10 a whole step (B→C♯)LKR lowers strings 4 & 8 a half step (E→D♯)Fret 15 · BB raises strings 3 & 6 a half step (G♯→A)Fret 16 · RKRRKR lowers string 4 a half step (E→D♯); lowers string 5 a half step (B→A♯)