B9 chord
B dominant ninth
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Play B9 on ukulele at frets 4-3-5-4 in gCEA tuning.
The B9 chord has the formula 1, 3, b7, 9 with notes B, D#, A, C#
The dominant ninth chord is mostly used in funk, blues and some rock music. It is usually played without the 5th on the ukulele.