4afdo: Difference between revisions

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Line 15: Line 15:
| 0
| 0
| [[1/1]]
| [[1/1]]
| 1.000
| 1.0000
| perfect unison
| perfect unison
|  
|  
Line 22: Line 22:
| 386.3
| 386.3
| [[5/4]]
| [[5/4]]
| 1.250
| 1.2500
| just major third
| just major third
| [[File:Jid_5_4_pluck_adu_dr220.mp3]]
| [[File:Jid_5_4_pluck_adu_dr220.mp3]]
Line 29: Line 29:
| 702.0
| 702.0
| [[3/2]]
| [[3/2]]
| 1.500
| 1.5000
| just perfect fifth
| just perfect fifth
| [[File:Jid_3_2_pluck_adu_dr220.mp3]]
| [[File:Jid_3_2_pluck_adu_dr220.mp3]]
Line 36: Line 36:
| 968.8
| 968.8
| [[7/4]]
| [[7/4]]
| 1.750
| 1.7050
| harmonic seventh
| harmonic seventh
| [[File:Jid_7_4_pluck_adu_dr220.mp3]]
| [[File:Jid_7_4_pluck_adu_dr220.mp3]]
Line 43: Line 43:
| 1200.0
| 1200.0
| [[2/1]]
| [[2/1]]
| 2.000
| 2.0000
| perfect octave
| perfect octave
| [[File:Jid_2_1_pluck_adu_dr220.mp3]]
| [[File:Jid_2_1_pluck_adu_dr220.mp3]]

Revision as of 02:51, 2 March 2023

Template:Infobox ADO

4ado is the arithmetic equal division of the octave into four parts of 1/4 each. Because 4 is a power of 2, 4ado corresponds to the 1st to 4th 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