+A semitone is the smallest [interval](/wiki/interval) in Western tonal music, often called a half step. It represents the distance between two adjacent [notes](/wiki/note) on a piano keyboard, forming the fundamental building block of scales and melodies.
+## See also
+- [Whole Tone](/wiki/whole_tone)
+- [Chromatic Scale](/wiki/chromatic_scale)
+- [Microtone](/wiki/microtone)
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