25/24
(Redirected from Chromatic semitone)
Ratio | 25/24 |
Monzo | [-3 -1 2⟩ |
Size in cents | 70.67243 |
Name(s) | classic chromatic semitone, chroma |
FJS name | A1^{25} |
[sound info] |
The classic chromatic semitone (short: chroma), 25/24, 70.672 cents, is the superparticular ratio which marks the difference between the 5-limit thirds, 6/5 and 5/4, and sixths, 8/5 and 5/3. It is therefore the amount which sharpens or flattens a 5-limit third or sixth, and when notating 5-limit just intonation it can be associated with the sharp or flat symbol, and along with an additional symbol for the 81/80 comma, it can be used for a complete system of 5-limit notation.
See also
- 48/25 -- its octave complement
- Gallery of just intervals
- Medium commas
- Chroma -- a generalising concept for MOS scales