B9 chord
B dominant ninth
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The B9 chord has the intervals I, II, III, vii with notes B, C#, D#, A
Matching Scales: B Mixolydian B Hindu B Arabic C# Minor C# Hindu C# Arabic D# Enigmatic D# Locrian D# Arabic A Lydian
The dominant ninth chord is mostly used in funk, blues and some rock music. It is usually played without the 5th on the ukulele.