+Ab4, or A-flat in the fourth octave, marks a specific musical [Pitch](/wiki/pitch). It resonates as a distinct [Note](/wiki/note) in many compositions, often heard within the central range of the piano.
+## See also
+- [Musical Scale](/wiki/musical_scale)
+- [Octave](/wiki/octave)
+- [A-flat](/wiki/a-flat)
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