What is the smallest interval we have on the piano? half-step
eighth-step
quarter-step
whole-step

half step

Explanation:

Minor Second (one Semitone, one Half-step)

Now we look at the other end of the spectrum: the smallest interval that we have in the Western Classical music tradition. The minor second (also called the "semitone" or "half-step") is the interval between any two adjacent notes in the chromatic scale.

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