4afdo

4ado (arithmetic division of the octave), or 4odo (otonal division of the octave), divides the octave into four parts of 1/4 each. As a scale it may be known as mode 4 of the harmonic series or the Over-4 scale. Because 4 is a power of 2, 4ado corresponds to the 4th to 8th harmonics octave-reduced. The notes of 4ado create a harmonic seventh chord.

Intervals

#	Cents	Ratio	Decimal	Interval name	Audio
0	0	1/1	1.0000	perfect unison
1	386.3	5/4	1.2500	just major third
2	702.0	3/2	1.5000	just perfect fifth
3	968.8	7/4	1.7050	harmonic seventh
4	1200.0	2/1	2.0000	perfect octave