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Fig. 1 · B5 on the keyboard

piano chord

B5

B1F♯5

Root and fifth, no third at all — neither major nor minor, which is the point.

on guitaron ukulelethe scale

What is true of it

B5 is B and F♯ — 1 and 5 counted from B.

B in other shapes

BmajorBmminorBdimdiminished

C5C♯5D♭5D5D♯5E♭5E5F5all 374