ratioFromSemitones method
The Ratio from semitones
for this EqualTemperament.
See Twelfth root of two.
Example:
const EqualTemperament.edo12().ratioFromSemitones(1) == Ratio(1.059463)
const EqualTemperament.edo19().ratioFromSemitones(1) == Ratio(1.037155)
Implementation
Ratio ratioFromSemitones(int semitones) =>
Ratio(math.pow(2, semitones / edo));