Apotome ( ancient Greek ἀποτομή , section, segment ' ) denotes the Pythagorean chromatic semitone in music since ancient Greece .
Apotome (flesh-colored) and Limma
The Pythagorean diatonic semitone is that
-
Limma = fourth - 2 whole tones with the frequency ratio cents .
The Pythagorean chromatic semitone is the
- Apotome = whole tone - Limma.
Their frequency ratio is calculated in cents .
The apotome (113.7 cents) is a Pythagorean comma (23.5 cents) larger than the limma (90.2 cents).