Cassandra triads: Difference between revisions

Line 1:

The '''cassandra triads''' are triads in which the two step sizes are (tempered versions of) 13:11 and 14:11 and the total span is a tempered perfect fifth. There are two of them, one of which is intermediate between major and supermajor, and the other intermediate between minor and subminor.

This tempers out the 364:363, which is one of the [[~~pentacircle_comma|~~pentacircle ~~commas~~]]. Cassandra triads appear in [[~~17edo|~~17edo]], and even more closely in [[~~29edo|~~29edo]]. Cassandra chords are closely related to the 19-limit rootsubminor, rootminor, rootmajor, and roostsupermajor triads; in fact, a Cassandra minor triad could be considered to function as both rootsubminor ''and'' as rootminor, and similarly the Cassandra major chord functions as both rootmajor and rootsupermajor.

This tempers out the 364:363, which is one of the [[pentacircle comma]]s. Cassandra triads appear in [[17edo]], and even more closely in [[29edo]]. Cassandra chords are closely related to the 19-limit rootsubminor, rootminor, rootmajor, and roostsupermajor triads; in fact, a Cassandra minor triad could be considered to function as both rootsubminor ''and'' as rootminor, and similarly the Cassandra major chord functions as both rootmajor and rootsupermajor.

~~==Consonance of Cassandra triads==~~

The name could have been related to the [[cassandra]] temperament before the discovery that ''cassandra'' and ''andromeda'' were named wrong way around and were later corrected.

The 13:11 and 14:11 dyads both reside near local [[~~Harmonic_Entropy|~~harmonic entropy]] maxima due to falling almost halfway between a septimal and a pental consonance. This, as well as the fact that the triadic just approximations are 242:286:364, do not make the Cassandra triads sound appealing as consonances.

== Consonance of cassandra triads ==

The 13:11 and 14:11 dyads both reside near local [[harmonic entropy]] maxima due to falling almost halfway between a septimal and a pental consonance. This, as well as the fact that the triadic just approximations are 242:286:364, do not make the Cassandra triads sound appealing as consonances.

However, appearances can be deceiving. I ([[Mason Green]]) find that Cassandra triads sound ''great'' harmonically, at least as good as 12edo ones if not better, and I have a theory as to why.

Line 19:

Line 21:

This, in fact, could be how the Cassandra minor chord is perceived and why it is so consonant, even though the individual thirds that make it up are not consonant as dyads. These chords could be called "Borromean" in that sense, and this gives them a certain "indivisible" quality. This makes them sound more cohesive to me.

In 29edo, the Cassandra triads are actually not even the closest approximations for either minor or subminor; you need to use a non-[[Patent_val|patent val]] approximations to use them in this manner, yet despite being non-patent they are reasonably convincing and this makes "val-switching" in compositions a reasonable option. Val-switching adds a great deal of flexibility and new [[~~comma_pump|~~comma pump]] options. Also, it means that 12edo melodies and chord progressions can be transferred to 29edo easily if in certain circumstances we use the cassandra chords in place of the ''patent'' minor and major triads.

In 29edo, the Cassandra triads are actually not even the closest approximations for either minor or subminor; you need to use a non-[[Patent_val|patent val]] approximations to use them in this manner, yet despite being non-patent they are reasonably convincing and this makes "val-switching" in compositions a reasonable option. Val-switching adds a great deal of flexibility and new [[comma pump]] options. Also, it means that 12edo melodies and chord progressions can be transferred to 29edo easily if in certain circumstances we use the cassandra chords in place of the ''patent'' minor and major triads.

[[Category:~~triad~~]]

[[Category:Triad]]

[[Category:Minor minthmic]]

@@ Line 1: / Line 1: @@
 The '''cassandra triads''' are triads in which the two step sizes are (tempered versions of) 13:11 and 14:11 and the total span is a tempered perfect fifth. There are two of them, one of which is intermediate between major and supermajor, and the other intermediate between minor and subminor.
-This tempers out the 364:363, which is one of the [[pentacircle_comma|pentacircle commas]]. Cassandra triads appear in [[17edo|17edo]], and even more closely in [[29edo|29edo]]. Cassandra chords are closely related to the 19-limit rootsubminor, rootminor, rootmajor, and roostsupermajor triads; in fact, a Cassandra minor triad could be considered to function as both rootsubminor ''and'' as rootminor, and similarly the Cassandra major chord functions as both rootmajor and rootsupermajor.
+This tempers out the 364:363, which is one of the [[pentacircle comma]]s. Cassandra triads appear in [[17edo]], and even more closely in [[29edo]]. Cassandra chords are closely related to the 19-limit rootsubminor, rootminor, rootmajor, and roostsupermajor triads; in fact, a Cassandra minor triad could be considered to function as both rootsubminor ''and'' as rootminor, and similarly the Cassandra major chord functions as both rootmajor and rootsupermajor.
-==Consonance of Cassandra triads==
+The name could have been related to the [[cassandra]] temperament before the discovery that ''cassandra'' and ''andromeda'' were named wrong way around and were later corrected.
-The 13:11 and 14:11 dyads both reside near local [[Harmonic_Entropy|harmonic entropy]] maxima due to falling almost halfway between a septimal and a pental consonance. This, as well as the fact that the triadic just approximations are 242:286:364, do not make the Cassandra triads sound appealing as consonances.
+== Consonance of cassandra triads ==
+The 13:11 and 14:11 dyads both reside near local [[harmonic entropy]] maxima due to falling almost halfway between a septimal and a pental consonance. This, as well as the fact that the triadic just approximations are 242:286:364, do not make the Cassandra triads sound appealing as consonances.
 However, appearances can be deceiving. I ([[Mason Green]]) find that Cassandra triads sound ''great'' harmonically, at least as good as 12edo ones if not better, and I have a theory as to why.
@@ Line 19: / Line 21: @@
 This, in fact, could be how the Cassandra minor chord is perceived and why it is so consonant, even though the individual thirds that make it up are not consonant as dyads. These chords could be called "Borromean" in that sense, and this gives them a certain "indivisible" quality. This makes them sound more cohesive to me.
-In 29edo, the Cassandra triads are actually not even the closest approximations for either minor or subminor; you need to use a non-[[Patent_val|patent val]] approximations to use them in this manner, yet despite being non-patent they are reasonably convincing and this makes "val-switching" in compositions a reasonable option. Val-switching adds a great deal of flexibility and new [[comma_pump|comma pump]] options. Also, it means that 12edo melodies and chord progressions can be transferred to 29edo easily if in certain circumstances we use the cassandra chords in place of the ''patent'' minor and major triads.
+In 29edo, the Cassandra triads are actually not even the closest approximations for either minor or subminor; you need to use a non-[[Patent_val|patent val]] approximations to use them in this manner, yet despite being non-patent they are reasonably convincing and this makes "val-switching" in compositions a reasonable option. Val-switching adds a great deal of flexibility and new [[comma pump]] options. Also, it means that 12edo melodies and chord progressions can be transferred to 29edo easily if in certain circumstances we use the cassandra chords in place of the ''patent'' minor and major triads.
-[[Category:triad]]
+[[Category:Triad]]
+[[Category:Minor minthmic]]
+{{Todo| cleanup }}