+Bb3 is a specific [musical note](/wiki/musical_note) representing the B-flat found in the third [octave](/wiki/octave). It sits above middle C, often appearing on the second line from the bottom in the treble clef.
+## See also
+- [B-flat](/wiki/b-flat)
+- [Pitch](/wiki/pitch)
+- [Treble Clef](/wiki/treble_clef)
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