Agreement of ninth of species

In tonal harmony, a agreement of ninth of species is a Accord of five notes pertaining to any species other than the first or the second species - the agreement of ninth of dominant. The use of the ninth of species is less frequent than that of the first two species.

In “ agreement of ninth of species ”, the word “ species ” is usually employed in the plural, because meaning agreement of seventh “ of various species ”. Sometimes certain theorists however, employ it in the singular - “ agreement of seventh of species ”.

General information

Preparation

Contrary to what occurs for the ninth from dominant, the ninth of species must be strictly prepared, i.e., must be heard, in the preceding agreement, with very the height and in same the left.

Resolution

The natural sequence of these agreements is made on the Fondamentale located a fifth below. The seventh and the ninth, both gravitational notes in these agreements, can make a exceptional resolution, just like in the agreement of ninth of dominant. An exceptional sequence can take place on any other agreement.

IVe degree of both modes, whose lower fifth succeeds, like let us know we it, with the sensitive , will be able to produce only one exceptional sequence (example M).

Figuring of the various states

The figuring is identical for each state. Let us note as a preliminary that in the event of accidental weatherings, the figuring of these various species will reveal deteriorations in question in accordance with the usual rules.

In a fundamental state an agreement of ninth of species amounts: “ 7 ” and “ 9 ”, or more simply “ 9 ”.
a first inversion amounts: “ 5 ”, “ 6 ” and “ 7 ”.
a second inversion amounts: “ 4 ”, 5 ” and “ 6 ”.

a third inversion amounts: “ 2 ”, “ 3 ”, and “ 4 ”.

Various species

3rd species: Ninth major and seventh minor

Placé on IIe and VIe degrees of the major mode and on IVe degree of the minor mode, the agreement of ninth major and seventh minor constitutes the 3rd species of the agreement of five notes.

It is made of a agreement of seventh minor more a ninth major. It can produce an ordinary sequence (examples has and B) or a sequence eceptionnel (example C).

Example: D, F, C, semi .

the agreement placed on IIe degree of the major mode can be employed as preparatory agreement (examples has and B).

Examples of ninth major and seventh minor:

4th species: Ninth minor and seventh minor

Placé on IIIe degree of the major mode, the agreement of ninth minor and seventh minor constitutes the 4th species of the agreement of five notes.

It is made of a agreement of seventh minor more a ninth minor. It can produce an ordinary sequence (D) example or an exceptional sequence (example E and F).

Example: D, F, C, mi $\ flat$ .

Examples of ninth minor and seventh minor:

5th species: Ninth minor and decreased fifth

Placé on VIIe degree of the major mode and on IIe degree of the minor mode, the agreement of ninth minor and decreased fifth constitutes the 5th species of the agreement of five notes.

It is made of a agreement of seventh minor and decreased fifth more a ninth minor . It can produce an ordinary sequence (examples G and H) or a sequence eceptionnel (example I).

Example: D, F, la $\ flat$ , C, mi $\ flat$ .

the agreement placed on IIe degree of the minor mode plays usually the preparatory part of agreement (examples G and H).

As for the of the same agreement structure, placed on VIIe degree of the major mode, it is usually analyzed like an agreement of thirteenth tonic on major tonality. One could also analyze it like an agreement of six sounds placed on the dominant one and deprived of his fundamental.

Examples of ninth minor and decreased fifth:

6th species: Ninth major and seventh major

Placé on Ier and IVe degrees of the major mode, the agreement of ninth major and seventh major constitutes the 6th species of the agreement of five notes.

It is made of a agreement of seventh major more a ninth major . It can produce an ordinary sequence (example J) or an exceptional sequence (examples K, L and M).

Example: D, fa $\ sharp$ , do $\ sharp$ , semi .

Examples of ninth major and seventh major:

7th species: Increased ninth

Placé on the Life degree of the minor mode, the agreement of increased ninth constitutes the 7th species of the agreement of five notes.

It is made of a agreement of seventh major more a increased ninth .

Example: D, fa $\ sharp$ , do $\ sharp$ , mi $\ sharp$ .

This species is not regarded as traditional. It is usually analyzed either like an agreement with foreign notes, or like a Inflected chord. The ninth of this agreement - the sensitive - being located one second increased above the Life degree, the movement obliged descendant of this ninth is impossible: consequently, this agreement can produce only one exceptional sequence.

8th species: Ninth minor and decreased seventh

Placé on VIIe degree of the minor mode, the agreement of ninth minor and decreased seventh constitutes the 8th species of the agreement of five notes.

It is made of a agreement of decreased seventh more a ninth minor .

Example: D, F, la $\ flat$ , do $\ flat$ , mi $\ flat$ .

This species is not regarded as traditional. It is usually analyzed like an agreement of thirteenth tonic on minor tonality. One could also analyze it like an agreement of six sounds placed on the Dominante and deprived of his fundamental. In any case, VIIe degree which can be Fundamental of no agreement, this species can produce only one exceptional sequence.

9th species: Ninth major, seventh major and perfect minor

Placé on Ier degree of the minor mode, the agreement of ninth major, seventh major and perfect minor constitutes the 9th species of the agreement of five notes.

It is made of a agreement of seventh major and perfect minor more a ninth major .

Example: D, F, do $\ sharp$ , semi .

This species is not regarded as traditional. It is usually analyzed either like an agreement with foreign notes, or like a Inflected chord. The seventh of this agreement - the sensitive - being located one second increased above the Life degree, the movement obliged descendant of this seventh is impossible: consequently, this agreement can produce only one exceptional sequence.

10th species: Ninth major and increased fifth

Placé on IIIe degree of the minor mode, the agreement of ninth major and increased fifth constitutes the 10th species of the agreement of five notes.

It is made of a agreement of seventh major and increased fifth more a ninth major .

Example: D, fa $\ sharp$ , la $\ sharp$ , do $\ sharp$ , semi .

This species is not regarded as traditional. It is usually analyzed either like an agreement with foreign notes, or like a Inflected chord.

See too

Internal bonds

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