B Dominant 7th, 1st inversion (D# in the bass)

ABD#F#
4 4
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Notes, from the bass up

D# (bass)F#AB

The same notes as B Dominant 7th (D#, F#, A and B), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.

See the full B Dominant 7th page for root position, every other inversion, open voicings and the chord formula.