Eagle 53: Difference between revisions
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O'Sullivan designed Eagle 53 to meet the following criteria: | O'Sullivan designed Eagle 53 to meet the following criteria: | ||
# Every note between 1/1 and 2/1, when paired with both 1/1 and 2/1 must make a high strength or medium strength melodic interval. (" | # Every [[note]] between [[1/1]] and [[2/1]], when paired with both 1/1 and 2/1 must make a high strength or medium strength melodic [[interval]]. ("Strength" according to the metric described in ''Eagle 53 Article'' (2017)). | ||
# The tuning must not have more than 12 notes per octave, so as to fit comfortably on small stringed instruments like ukeleles. | # The tuning must not have more than 12 notes per [[octave]], so as to fit comfortably on small stringed instruments like ukeleles. | ||
# There must be at least one good chord on each of the twelve notes. ("Good" according to the | # There must be at least one good [[chord]] on each of the twelve notes. ("Good" according to the metric described in ''Eagle 53 Article'' (2017)). | ||
# These good chords must be playable on a fretted instrument such as a guitar. | # These good chords must be playable on a fretted instrument such as a guitar. | ||
The overall aim was to improve upon and replace [[12edo]], by making 12edo's | The overall aim was to improve upon and replace [[12edo]], by making 12edo's [[consonance]]s even more in-tune, at least in the most important keys, while also making available new exotic consonances and melodies which 12edo lacks. | ||
Though it used a completely different ''methodology'' than a [[well temperament]], the ''philosophy'' behind Eagle 53 was similar to one. It is not a well temperament, but it achieves many similar aims to one. | Though it used a completely different ''methodology'' than a [[well temperament]], the ''philosophy'' behind Eagle 53 was similar to one. It is not a well temperament, but it achieves many similar aims to one. | ||
Revision as of 10:36, 3 December 2024
Eagle 53 is a 12-tone tempered scale invented by John O'Sullivan.
Conception
O'Sullivan designed Eagle 53 to meet the following criteria:
- Every note between 1/1 and 2/1, when paired with both 1/1 and 2/1 must make a high strength or medium strength melodic interval. ("Strength" according to the metric described in Eagle 53 Article (2017)).
- The tuning must not have more than 12 notes per octave, so as to fit comfortably on small stringed instruments like ukeleles.
- There must be at least one good chord on each of the twelve notes. ("Good" according to the metric described in Eagle 53 Article (2017)).
- These good chords must be playable on a fretted instrument such as a guitar.
The overall aim was to improve upon and replace 12edo, by making 12edo's consonances even more in-tune, at least in the most important keys, while also making available new exotic consonances and melodies which 12edo lacks.
Though it used a completely different methodology than a well temperament, the philosophy behind Eagle 53 was similar to one. It is not a well temperament, but it achieves many similar aims to one.
Relationship to other scales
Eagle 53 is a subset of 53edo.
Eagle 53's just version is identical to that of Euler's Genus Diatonico-chromaticum and Ellis' Duodene, except that those used 45/32 instead of 7/5.
This similarity is by coincidence and may simply speak to the fact that this is a useful and relatively simple scale that theorists are likely to land upon over and over, much like 2L 3s or like 53edo itself.
Scala file
! eagle53.scl ! Eagle 53, John O'Sullivan, key of E 12 ! 113.208 203.774 316.981 384.906 498.113 588.679 701.887 815.094 883.019 1018.868 1086.792 1200.000
Detempering
! eagleJI.scl ! Eagle 53 detempering, John O'Sullivan, key of E 12 ! 16/15 9/8 6/5 5/4 4/3 7/5 3/2 8/5 5/3 9/5 5/8 2/1
Music
- Taking Flight - Xotla (2019)
Further reading
- Eagle Tuning Facebook group
- Eagle 53 Article - John O'Sullivan (2017)
- johnsmusic7.com: O'Sullivan's website. Contains further material on Eagle 53 among other topics.