Ross W. Duffin, Just Intonation in Renaissance Theory and Practice

 

Table 3. Common Microtonal intervals of Just intonation
 
Interval
Example
Ratio
Cents
Sound
diesis
C#-1 - Db+1
2048:2025
19.55
syntonic comma
C0 - C+1
81:80
21.51
Pythagorean comma
C0 - B#0
531441:524288
23.46