Ragismic chords: Difference between revisions
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'''Ragismic chords''' are [[Dyadic chord|essentially tempered chords]] tempered by the ragisma, [[4375/4374]]. | '''Ragismic chords''' are [[Dyadic chord|essentially tempered chords]] tempered by the ragisma, [[4375/4374]]. | ||
Since the temperament is complex, even the simplest ragismic chords are [[27-odd-limit]], although they contain only [[7-limit|7-prime-limit]] intervals. There are 6 triads, 21 tetrads, 22 pentads and 7 hexads as essentially tempered chords. | |||
For triads, there are two palindromic chords and | For triads, there are two palindromic chords and two pairs of chords in inverse relationship. The palindromic chords are | ||
* 1-27/25-7/6 chord with steps of 27/25-27/25-12/7; | * 1-27/25-7/6 chord with steps of 27/25-27/25-12/7; | ||
* 1-25/18-27/14 chord with steps of 25/18-25/18-28/27. | * 1-25/18-27/14 chord with steps of 25/18-25/18-28/27. | ||
The inversely related | The inversely related pairs of chords are | ||
* 1-9/7-25/18 with steps of 9/7-27/25-36/25 and its inverse 1-27/25-25/18 with steps of 27/25-9/7-36/25. | * 1-9/7-25/18 with steps of 9/7-27/25-36/25 and its inverse 1-27/25-25/18 with steps of 27/25-9/7-36/25; | ||
* 1-25/24-27/25 with steps of 25/24-28/27-50/27 and its inverse 1-25/24-27/14 with steps of 25/24-50/27-28/27. | |||
For tetrads, there are | For tetrads, there are five palindromic chords and eight pairs of chords in inverse relationship. The palindromic chords are | ||
* 1-27/25-25/18-14/9 chord with steps of 27/25-9/7-28/25-9/7; | |||
* 1-27/25-25/18-3/2 chord with steps of 27/25-9/7-27/25-4/3; | * 1-27/25-25/18-3/2 chord with steps of 27/25-9/7-27/25-4/3; | ||
* 1-27/25-25/18 | * 1-27/25-9/7-25/18 chord with steps of 27/25-25/21-27/25-36/25; | ||
* 1-27/25-9/ | * 1-25/24-27/25-9/8 chord with steps of 25/24-28/27-25/24-16/9; | ||
* 1-25/24-27/25-27/14 chord with steps of 25/24-28/27-25/14-28/27. | |||
The inversely related pairs of chords are | The inversely related pairs of chords are | ||
* 1-27/25-7/6- | * 1-27/25-7/6-3/2 with steps of 27/25-27/25-9/7-4/3 and its inverse 1-27/25-7/6-14/9 with steps of 27/25-27/25-4/3-9/7; | ||
* 1-27/25-7/6-25/18 with steps of 27/25-27/25-25/21-36/25 and its inverse 1-25/21-9/7-25/18 with steps of 25/21-27/25-27/25-36/25; | * 1-27/25-7/6-25/18 with steps of 27/25-27/25-25/21-36/25 and its inverse 1-25/21-9/7-25/18 with steps of 25/21-27/25-27/25-36/25; | ||
* 1-25/18-3/2-27/14 with steps of 25/18-27/25-9/7-28/27 and its inverse 1-27/25-3/2-14 | * 1-27/25-3/2-14/9 with steps of 27/25-25/18-28/27-9/7 and its inverse 1-25/18-3/2-27/14 with steps of 25/18-27/25-9/7-28/27; | ||
* 1-27/25-25/ | * 1-25/18-25/14-27/14 with steps of 25/18-9/7-27/25-28/27 and its inverse 1-27/25-25/18-27/14 with steps of 27/25-9/7-25/18-28/27; | ||
* 1-25/24-27/25-3/2 with steps of 25/24-28/27-25/18-4/3 and its inverse 1-25/24-25/18-27/14 with steps of 25/24-4/3-25/18-28/27; | |||
* 1-25/24-27/25-25/18 with steps of 25/24-28/27-9/7-36/25 and its inverse 1-25/24-3/2-27/14 with steps of 25/24-36/25-9/7-28/27; | |||
* 1-27/25-9/8-7/6 with steps of 27/25-25/24-28/27-12/7 and its inverse 1-25/24-9/8-27/14 with steps of 25/24-27/25-12/7-28/27; | |||
* 1-25/24-27/25-7/6 with steps of 25/24-28/27-27/25-12/7 and its inverse 1-25/24-25/14-27/14 with steps of 25/24-12/7-27/25-28/27. | |||
For pentads, there are | For pentads, there are two palindromic chords and ten pairs of chords in inverse relationship. The palindromic chords are | ||
* 1-27/25-7/6-3/2-14/9 chord with steps of 27/25-27/25-9/7-28/27-9/7. | * 1-27/25-7/6-3/2-14/9 chord with steps of 27/25-27/25-9/7-28/27-9/7; | ||
* 1-25/24-27/25-9/8-3/2 chord with steps of 25/24-28/27-25/24-4/3-4/3. | |||
The inversely related pairs of chords are | The inversely related pairs of chords are | ||
* 1-27/25-25/18- | * 1-27/25-7/6-25/18-14/9 with steps of 27/25-27/25-25/21-28/25-9/7 and its inverse 1-27/25-7/6-3/2-42/25 with steps of 27/25-27/25-9/7-28/25-25/21; | ||
* 1-27/25-7/6-25/18-3/2 with steps of 27/25-27/25-25/21-27/25-4/3 and its inverse 1-27/25-7/6-14/9-42/25 with steps of 27/25-27/25-4/3-27/25-25/21; | * 1-27/25-7/6-25/18-3/2 with steps of 27/25-27/25-25/21-27/25-4/3 and its inverse 1-27/25-7/6-14/9-42/25 with steps of 27/25-27/25-4/3-27/25-25/21; | ||
* 1-27/25-7/ | * 1-9/7-25/18-25/14-27/14 with steps of 9/7-27/25-9/7-27/25-28/27 and its inverse 1-27/25-25/18-3/2-27/14 with steps of 27/25-9/7-27/25-9/7-28/27; | ||
* 1-25/18-3/2-25/ | * 1-25/18-3/2-25/14-27/14 with steps of 25/18-27/25-25/21-27/25-28/27 and its inverse 1-27/25-3/2-14/9-42/25 with steps of 27/25-25/18-28/27-27/25-25/21; | ||
* 1-27/25-9/8-7/6-3/2 with steps of 27/25-25/24-28/27-9/7-4/3 and its inverse 1-9/7-4/3-25/18-3/2 with steps of 9/7-28/27-25/24-27/25-4/3; | |||
* 1-25/24-27/25-7/6-3/2 with steps of 25/24-28/27-27/25-9/7-4/3 and its inverse 1-9/7-25/18-36/25-3/2 with steps of 9/7-27/25-28/27-25/24-4/3; | |||
* 1-25/24-27/25-25/18-3/2 with steps of 25/24-28/27-9/7-27/25-4/3 and its inverse 1-27/25-25/18-36/25-3/2 with steps of 27/25-9/7-28/27-25/24-4/3; | |||
* 1-25/24-27/25-7/6-25/18 with steps of 25/24-28/27-27/25-25/21-36/25 and its inverse 1-25/21-9/7-4/3-25/18 with steps of 25/21-27/25-28/27-25/24-36/25. | |||
* 1-25/24-27/25-25/18-27/14 with steps of 25/24-28/27-9/7-25/18-28/27 and its inverse 1-25/24-27/25-3/2-27/14 with steps of 25/24-28/27-25/18-9/7-28/27. | |||
* 1-25/24-27/25-9/8-7/6 with steps of 25/24-28/27-25/24-28/27-12/7 and its inverse 1-25/24-27/25-9/8-27/14 with steps of 25/24-28/27-25/24-12/7-28/27. | |||
For hexads, there are one palindromic chord and three pairs of chords in inverse relationship. The palindromic chord is | |||
* 1-25/24-27/25-25/18-3/2-27/14 chord with steps of 25/24-28/27-9/7-27/25-9/7-28/27. | |||
The inversely related pairs of chords are | |||
* 1-27/25-7/6-25/18-3/2-14/9 with steps of 27/25-27/25-25/21-27/25-28/27-9/7 and its inverse 1-27/25-7/6-3/2-14/9-42/25 with steps of 27/25-27/25-9/7-28/27-27/25-25/21. | * 1-27/25-7/6-25/18-3/2-14/9 with steps of 27/25-27/25-25/21-27/25-28/27-9/7 and its inverse 1-27/25-7/6-3/2-14/9-42/25 with steps of 27/25-27/25-9/7-28/27-27/25-25/21; | ||
* 1-25/24-27/25-7/6-25/18-3/2 with steps of 25/24-28/27-27/25-25/21-27/25-4/3 and its inverse 1-27/25-9/7-25/18-36/25-3/2 with steps of 27/25-25/21-27/25-28/27-25/24-4/3; | |||
* 1-25/24-27/25-9/8-7/6-3/2 with steps of 25/24-28/27-25/24-28/27-9/7-4/3 and its inverse 1-25/24-27/25-9/8-3/2-27/14 with steps of 25/24-28/27-25/24-4/3-9/7-28/27. | |||
Equal temperaments with ragismic chords include {{Optimal ET sequence|19, 53, 72, 99, 118, 152, 171, 224, 270, 323, 441, 494, 612, 665, 783, 935, 1106, 1277 and 1547}}. | Equal temperaments with ragismic chords include {{Optimal ET sequence|19, 53, 72, 99, 118, 152, 171, 224, 270, 323, 441, 494, 612, 665, 783, 935, 1106, 1277 and 1547}}. |