User:Aura/Aura's Diatonic Scales: Difference between revisions
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== Introduction == | == Introduction == | ||
Just about every non-microtonal musician these days is acquainted with the 12edo diatonic scale. Some may also know the diatonic modes- Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian. However in higher EDOs, as well as in Just Intonation, things are a little different. To start with, there are two well-known tunings for diatonic scales: the Pythagorean Diatonic Scale, and Ptolemy's Intense Diatonic Scale, but the Pythagorean Diatonic Scale is ill-suited for modulation, while the selections of notes in Ptolemy's Intense Diatonic Scale is ill-suited for building chords and chord progressions using just the notes in those scales. In both cases, it has been one sort of wolf-fifth or other that has caused problems due to the wolf fifth having a sound other than that of the 3/2 Perfect 5th. For the longest time, these wolf fifths were considered unusable, which is part of what led to the dominance of 12edo in the first place. However, I've found that the 40/27 grave fifth and intervals that approximate it ''are'' in fact usable in chord progressions- assuming that they are positioned correctly within a given just diatonic scale, and I have adopted my own version of a Just Diatonic Scale accordingly. Furthermore, I've found that in retuning the traditional diatonic modes in accordance with their differences from standard Major and Minor, the traditional diatonic modes cease to qualify as modes of the same diatonic scale, and instead give rise to several different diatonic scales of their own, complete with their own modes. As a final note, I prefer all the notes of my scales to be related to the tonic by ratios which have a power of 2- for reasons which I'll explain below- in either the numerator or the denominator, and this leads not only to 5/3 getting replaced by 27/16 as the ideal ratio for the Major Sixth scale degree above the tonic- a change also made in light of my findings on the ideal location for the grave fifth and intervals that approximate it- but also to the substitution of 77/64 for 6/5 for the Minor Third scale degree in cases where I'm not restricted to using just the 3-limit and the 5-limit for defining notes in the diatonic scale. I shall use this page for detailing my findings, as well as to document the modes of the now separated diatonic scales. | Just about every non-microtonal musician these days is acquainted with the 12edo diatonic scale. Some may also know the diatonic modes- Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian. However in higher EDOs, as well as in Just Intonation, things are a little different. To start with, there are two well-known tunings for diatonic scales: the Pythagorean Diatonic Scale, and Ptolemy's Intense Diatonic Scale, but the Pythagorean Diatonic Scale is ill-suited for modulation, while the selections of notes in Ptolemy's Intense Diatonic Scale is ill-suited for building chords and chord progressions using just the notes in those scales. In both cases, it has been one sort of wolf-fifth or other that has caused problems due to the wolf fifth having a sound other than that of the 3/2 Perfect 5th. For the longest time, these wolf fifths were considered unusable, which is part of what led to the dominance of 12edo in the first place. However, I've found that the 40/27 grave fifth and intervals that approximate it ''are'' in fact usable in chord progressions- assuming that they are positioned correctly within a given just diatonic scale, and I have adopted my own version of a Just Diatonic Scale accordingly. Furthermore, I've found that in retuning the traditional diatonic modes in accordance with their differences from standard Major and Minor, the traditional diatonic modes cease to qualify as modes of the same diatonic scale, and instead give rise to several different diatonic scales of their own, complete with their own modes. As a final note, I prefer all the notes of my scales to be related to the tonic by ratios which have a power of 2- for reasons which I'll explain below- in either the numerator or the denominator, and this leads not only to 5/3 getting replaced by 27/16 as the ideal ratio for the Major Sixth scale degree above the tonic- a change also made in light of my findings on the ideal location for the grave fifth and intervals that approximate it- but also to the substitution of 77/64 for 6/5 for the Minor Third scale degree in cases where I'm not restricted to using just the 3-limit and the 5-limit for defining notes in the diatonic scale. I shall use this page for detailing my findings, as well as to document the modes of the now-separated diatonic scales. | ||
== Definitions of Scale Degree Names == | == Definitions of Scale Degree Names == | ||
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All of the chief diatonic scales listed here are named for their most useful mode. Yes, I've actually used all of these particular scales as the the basis for tonality, and yes, all of the most useful modes of all of these diatonic scales are actually capable of circle progressions using just the notes in the scale, although this often requires using tricks such as having a Suspended-4 chord on the Dominant. Phrygian, Lydian and Locrian require additional tricks, which I'll mention under their respective scales. | All of the chief diatonic scales listed here are named for their most useful mode. Yes, I've actually used all of these particular scales as the the basis for tonality, and yes, all of the most useful modes of all of these diatonic scales are actually capable of circle progressions using just the notes in the scale, although this often requires using tricks such as having a Suspended-4 chord on the Dominant. Phrygian, Lydian and Locrian require additional tricks, which I'll mention under their respective scales. | ||
'''Ionian''' | '''<u>Ionian</u>''' | ||
My preferred version of this scale differs from Ptolemy's Intense Diatonic Scale only by having 27/16 as the ratio between the Tonic and the Submediant. Therefore, it consists of notes related to the Tonic by the following ratios: | My preferred version of this scale differs from Ptolemy's Intense Diatonic Scale only by having 27/16 as the ratio between the Tonic and the Submediant. Therefore, it consists of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 9/8 | - 9/8 | ||
- 5/4 | - 5/4 | ||
- 4/3 | - 4/3 | ||
- 3/2 | - 3/2 | ||
- 27/16 | - 27/16 | ||
- 15/8 | - 15/8 | ||
- 2/1 | - 2/1 | ||
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- Ionic Dorian | - Ionic Dorian | ||
- Ionic Phrygian | - Ionic Phrygian | ||
- Ionic Lydian | - Ionic Lydian | ||
- Ionic Mixolydian | - Ionic Mixolydian | ||
- Ionic Aeolian | - Ionic Aeolian | ||
- Ionic Locrian | - Ionic Locrian | ||
'''Dorian''' | '''<u>Dorian</u>''' | ||
Unlike the version that is present in 12edo- and perhaps even many other Just versions of this scale, my preferred version of this scale is not symmetrical, as having it be symmetrical would result in a less-than-ideal tuning for the interval between the Mediant and the Contramediant- instead, it is the first of two diatonic scales in this set that uses 256/243 as the interval between two of its notes. This scale consists of notes related to the Tonic by the following ratios: | Unlike the version that is present in 12edo- and perhaps even many other Just versions of this scale, my preferred version of this scale is not symmetrical, as having it be symmetrical would result in a less-than-ideal tuning for the interval between the Mediant and the Contramediant- instead, it is the first of two diatonic scales in this set that uses 256/243 as the interval between two of its notes. This scale consists of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 9/8 | - 9/8 | ||
- 77/64 | - 77/64 | ||
- 4/3 | - 4/3 | ||
- 3/2 | - 3/2 | ||
- 27/16 | - 27/16 | ||
- 16/9 | - 16/9 | ||
- 2/1 | - 2/1 | ||
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- Doric Phrygian | - Doric Phrygian | ||
- Doric Lydian | - Doric Lydian | ||
- Doric Mixolydian | - Doric Mixolydian | ||
- Doric Aeolian | - Doric Aeolian | ||
- Doric Locrian | - Doric Locrian | ||
- Doric Ionian | - Doric Ionian | ||
'''Phrygian''' | '''<u>Phrygian</u>''' | ||
Unlike the version that is present in 12edo- and likely even many other Just versions of this scale, my preferred version actually differs from the inverse of the Ionian scale. A circle progression in this scale requires not only a Suspended-4 chord on the Contramediant, but also both a Suspended-Sharp-4 chord on the Reverse Lead, and, a Half-Diminished chord with added Minor 9th on the Dominant. This scale consists of notes related to the Tonic by the following ratios: | Unlike the version that is present in 12edo- and likely even many other Just versions of this scale, my preferred version actually differs from the inverse of the Ionian scale. A circle progression in this scale requires not only a Suspended-4 chord on the Contramediant, but also both a Suspended-Sharp-4 chord on the Reverse Lead, and, a Half-Diminished chord with added Minor 9th on the Dominant. This scale consists of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 16/15 | - 16/15 | ||
- 77/64 | - 77/64 | ||
- 4/3 | - 4/3 | ||
- 3/2 | - 3/2 | ||
- 8/5 | - 8/5 | ||
- 16/9 | - 16/9 | ||
- 2/1 | - 2/1 | ||
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- Phrygic Lydian | - Phrygic Lydian | ||
- Phrygic Mixolydian | - Phrygic Mixolydian | ||
- Phrygic Aeolian | - Phrygic Aeolian | ||
- Phrygic Locrian | - Phrygic Locrian | ||
- Phrygic Ionian | - Phrygic Ionian | ||
- Phrygic Dorian | - Phrygic Dorian | ||
'''Lydian''' | '''<u>Lydian</u>''' | ||
This scale is the one most closely associated with Ptolemy's Intense Diatonic Scale; in fact, Ptolemy's Intense Diatonic scale occurs as "Lydic Ionian"- the fifth mode of this scale. If you use the Sycophant Antitonic harmony, you are forced to follow it up with the Lead harmony if you want to maintain this tonality. Likewise, using the full Supertonic harmony is generally ill-advised unless you swiftly follow it up with the Tonic- otherwise, you need to omit the third of this chord if you want to maintain this tonality. This scale consists of notes related to the Tonic by the following ratios: | This scale is the one most closely associated with Ptolemy's Intense Diatonic Scale; in fact, Ptolemy's Intense Diatonic scale occurs as "Lydic Ionian"- the fifth mode of this scale. If you use the Sycophant Antitonic harmony, you are forced to follow it up with the Lead harmony if you want to maintain this tonality. Likewise, using the full Supertonic harmony is generally ill-advised unless you swiftly follow it up with the Tonic- otherwise, you need to omit the third of this chord if you want to maintain this tonality. This scale consists of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 9/8 | - 9/8 | ||
- 5/4 | - 5/4 | ||
- 45/32 | - 45/32 | ||
- 3/2 | - 3/2 | ||
- 27/16 | - 27/16 | ||
- 15/8 | - 15/8 | ||
- 2/1 | - 2/1 | ||
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- Lydic Mixolydian | - Lydic Mixolydian | ||
- Lydic Aeolian | - Lydic Aeolian | ||
- Lydic Locrian (only ever distinct from Locrian proper if the Keenanisma is not tempered out) | - Lydic Locrian (only ever distinct from Locrian proper if the Keenanisma is not tempered out) | ||
- Lydic Ionian (otherwise known as Ptolemy's Intense Diatonic Scale) | - Lydic Ionian (otherwise known as Ptolemy's Intense Diatonic Scale) | ||
- Lydic Dorian | - Lydic Dorian | ||
- Lydic Phrygian | - Lydic Phrygian | ||
'''Mixolydian''' | '''<u>Mixolydian</u>''' | ||
This scale is the second of two diatonic scales in this set that uses 256/243 as the interval between two of its notes. It consists of notes related to the Tonic by the following ratios: | This scale is the second of two diatonic scales in this set that uses 256/243 as the interval between two of its notes. It consists of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 9/8 | - 9/8 | ||
- 5/4 | - 5/4 | ||
- 4/3 | - 4/3 | ||
- 3/2 | - 3/2 | ||
- 27/16 | - 27/16 | ||
- 16/9 | - 16/9 | ||
- 2/1 | - 2/1 | ||
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- Myxic Aeolian | - Myxic Aeolian | ||
- Myxic Locrian | - Myxic Locrian | ||
- Myxic Ionian | - Myxic Ionian | ||
- Myxic Dorian | - Myxic Dorian | ||
- Myxic Phrygian | - Myxic Phrygian | ||
- Myxic Lydian | - Myxic Lydian | ||
'''Aeolian''' | '''<u>Aeolian</u>''' | ||
Aside from the substitution of the 77/64 Minor 3rd for the 6/5 Minor 3rd found in other Just versions of this scale, my preferred version of the Aeolian scale is pretty typical. It consists of notes related to the Tonic by the following ratios: | Aside from the substitution of the 77/64 Minor 3rd for the 6/5 Minor 3rd found in other Just versions of this scale, my preferred version of the Aeolian scale is pretty typical. It consists of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 9/8 | - 9/8 | ||
- 77/64 | - 77/64 | ||
- 4/3 | - 4/3 | ||
- 3/2 | - 3/2 | ||
- 8/5 | - 8/5 | ||
- 16/9 | - 16/9 | ||
- 2/1 | - 2/1 | ||
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- Aeolic Locrian | - Aeolic Locrian | ||
- Aeolic Ionian | - Aeolic Ionian | ||
- Aeolic Dorian | - Aeolic Dorian | ||
- Aeolic Phrygian | - Aeolic Phrygian | ||
- Aeolic Lydian | - Aeolic Lydian | ||
- Aeolic Mixolydian | - Aeolic Mixolydian | ||
'''Locrian''' | '''<u>Locrian</u>''' | ||
One might think that Locrian is useless and not even worth the trouble, however, the actual problem is that people generally don't know how to handle a flattened fifth, and they assume that the harmony of Locrian must be strictly tertian when this is not the case at all. In truth, Locrian harmonies generally rely on the omission of either the fifth or the third- with the only consistent exceptions being the Tyrant Antitonic chord on the flattened fifth, and variants of the Tonic harmony that are used as a means of creating tension. If one is looking for resolution in this mode, they only have to create a chord consisting of the Tonic, the Mediant, and octave reduplications of the Tonic both above and below. Do note that because Locrian's strongest distal harmony is the Tyrant Antitonic harmony- which is unable to act as a proper anchor for melodies without chord support- the Tonic, Mediant, and Subtonic pick up the slack and are thus more common than they would be otherwise, with the end result being that Locrian chord progressions run a significant risk of stagnation, especially in the hands of unskilled composers. A circle progression in Locrian requires not only the omission of the third on the Reverse Lead chord, but also the displacement of the Tyrant Antitonic chord's third upwards by an octave. This scale is only distinct from the Lydian scale if the Keenanisma is not tempered out, as otherwise, the step patterns between the two scales are identical- with the Locrian scale consisting of notes related to the Tonic by the following ratios: | One might think that Locrian is useless and not even worth the trouble, however, the actual problem is that people generally don't know how to handle a flattened fifth, and they assume that the harmony of Locrian must be strictly tertian when this is not the case at all. In truth, Locrian harmonies generally rely on the omission of either the fifth or the third- with the only consistent exceptions being the Tyrant Antitonic chord on the flattened fifth, and variants of the Tonic harmony that are used as a means of creating tension. If one is looking for resolution in this mode, they only have to create a chord consisting of the Tonic, the Mediant, and octave reduplications of the Tonic both above and below. Do note that because Locrian's strongest distal harmony is the Tyrant Antitonic harmony- which is unable to act as a proper anchor for melodies without chord support- the Tonic, Mediant, and Subtonic pick up the slack and are thus more common than they would be otherwise, with the end result being that Locrian chord progressions run a significant risk of stagnation, especially in the hands of unskilled composers. A circle progression in Locrian requires not only the omission of the third on the Reverse Lead chord, but also the displacement of the Tyrant Antitonic chord's third upwards by an octave. This scale is only distinct from the Lydian scale if the Keenanisma is not tempered out, as otherwise, the step patterns between the two scales are identical- with the Locrian scale consisting of notes related to the Tonic by the following ratios: | ||
- 1/1 | - 1/1 | ||
- 16/15 | - 16/15 | ||
- 77/64 | - 77/64 | ||
- 4/3 | - 4/3 | ||
- 64/45 | - 64/45 | ||
- 8/5 | - 8/5 | ||
- 16/9 | - 16/9 | ||
- 2/1 | - 2/1 | ||
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- Locric Ionian | - Locric Ionian | ||
- Locric Dorian | - Locric Dorian | ||
- Locric Phrygian | - Locric Phrygian | ||
- Locric Lydian (only ever distinct from Lydian proper if the Keenanisma is not tempered out) | - Locric Lydian (only ever distinct from Lydian proper if the Keenanisma is not tempered out) | ||
- Locric Mixolydian | - Locric Mixolydian | ||
- Locric Aeolian | - Locric Aeolian | ||