Answer:
semitone / half step / half tone
A semitone (British English) (also called a half step or a half tone) is the smallest musical interval used in Western music. It is the distance between two notes which are next to one another in pitch.
Answer:
In the language of music theory, a step is the distance between notes of different pitches. A half step, or semitone, is the smallest interval between notes in Western music.
Explanation:
So it's a "Half step"
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