PFDO

A p-FDO (p-mean frequency division of the octave) is a periodic tuning system which divides the octave using power means. For example:

• p = 0 corresponds to EDO,
• p = 1 corresponds to AFDO,
• p = -1 corresponds to IFDO.

Except for the case where p = 0, the frequency ratio of the k-th interval in the first octave of n-p-FDO is

$$\left( (n - k)/n + 2^p \cdot k/n \right)^{1/p}$$

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