E♭ 7th chord on bass (E♭7)

Why it sounds like that

E♭ 7th uses the formula 1, 3, 5, ♭7. The minor 7th interval between E♭ and D♭ gives the chord its dominant quality, and the diminished 5th between G and D♭ adds tension. Compare it with E♭ major, which omits the ♭7.

What goes wrong with E♭ 7th?

• Letting the pinky collapse and buzz the A string at fret 13.
• Allowing the ring finger to touch the D string and mute it.
• Striking the open E string instead of fretting it at the 11th fret.

When to use it

E♭ 7th is the V chord in A♭ major, so it appears in progressions like A♭–D♭–E♭–A♭ (I–IV–V–I). Its dominant pull suits blues, jazz, and rock bass lines that resolve to A♭.

Changing to and from E♭ 7th

• Move to A♭ major by lifting the pinky and shifting the index and middle fingers down one string each.
• Slide the shape down two frets to the 9th fret to play C♯ 7th.

Which voicing to use

The 11th-fret shape has E♭ in the bass and is the most direct voicing. The E♭7/B♭ inversion at the 6th fret puts B♭ in the bass for a smoother transition from A♭ major, while the E♭7/D♭ inversion at the 9th fret leads into A♭ major by step.