+**Bb2** is a musical note, specifically the B-flat found in the second octave. It sounds a whole step below [C2](/wiki/c2) and a semitone above [A2](/wiki/a2), holding a distinct place in the lower register. Its frequency forms a foundational element in many compositions.
+## See also
+- [Musical Note](/wiki/musical_note)
+- [Pitch](/wiki/pitch)
+- [Octave](/wiki/octave)
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