+**Bb0** is the deepest B-flat on a standard 88-key piano, a profoundly low [Musical Pitch](/wiki/musical_pitch) that vibrates at the edge of human audibility. This [Fundamental Frequency](/wiki/fundamental_frequency) anchors complex harmonic structures, providing a resonant foundation for various compositions.
+## See also
+- [Octave](/wiki/octave)
+- [Harmonics](/wiki/harmonics)
+- [Sound](/wiki/sound)
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