4afdo

4ado is the arithmetic equal division of the octave into four parts of 1/4 each.

Intervals

#	Cents	Ratio	Interval name
0	0	1/1	perfect unison
1	386.3	5/4	just major third
2	702.0	3/2	just perfect fifth
3	968.8	7/4	harmonic seventh
4	1200.0	2/1	perfect octave