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Fig. 1 · B7 on the keyboard

piano chord

B7

B1D♯3F♯5A♭7

Major triad, minor seventh. The chord that wants to resolve a fourth up.

on guitaron ukulelethe scale

What is true of it

B7 is B, D♯, F♯ and A — 1, 3, 5 and b7 counted from B.

On an instrument that cannot reach all 4, the 5 goes first, in that order.

B in other shapes

Bmaj7major seventhBm7minor seventhBm(maj7)minor major seventhBmajorBmminorBdimdiminished

C7C♯7D♭7D7D♯7E♭7E7F7all 374