1. Pitch-bend messages range in ±2 semitones (sometimes adjustable with Registered Parameter Numbers ), with precision of 1/8192 semitone. (The human ear cannot hear the difference between adjacent pure tones that differ by less than 1/20 semitone.

2. Crabwise scales involve playing a scale up and down, but changing the scale by a semitone every time you change direction

3. Definitions for the word, Acciaccatura (n.) A short grace note, one semitone below the note to which it is prefixed; -- used especially in organ music

4. Put simply, a Chromatic scale is all twelve notes arranged in ascending or descending order of pitch. It’s made up entirely of semitones (half steps) with each note being a semitone above or below the last note

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