From the article you will learn what the seventh chord is, its types in structure. The introductory seventh chords will be considered in more detail: small and reduced. You will learn how to build them correctly, what kind of appeals they have and where to resolve them.
What is a seventh chord?
Before considering what the introductory seventh chord is and the dominant, what they are, what calls have and where they are resolved, you should look at the concept of the seventh chord as such.
This is such a chord (or such a harmony), which contains four sounds. All of them are located in large or small thirds.
Its name did not arise by chance. The first and last sounds of the seventh chord make up the septima - the musical interval.
The four-sounding nature of this chord makes it particularly unstable and requires mandatory resolution. In classical music, all kinds of seventh chords are used to dynamize it. In modern music, they are very widely used.
The sounds of this chord are called the same as the intervals that are formed from the main tone. These are: prima (main tone), thirds (tertz tone), quinta (fifth tone) and septima.
Types of seventh chords by structure
- Big major. Underlying is a major triad. The first and last sounds cover a large septima.
- Minor major. The basis is the triad of major. The first and last sounds span the interval of minor septima.
- Minor minor. The triad of the minor is at its core. The first and last sounds span the small septima.
- Big minor. At the core is a minor triad. The first and last sounds span the interval of large septima.
- Small reduced. It is also called half-reduced. The basis of this seventh chord is a reduced triad. The first and last sounds cover the interval of reduced septima. Sounds like a minor minor. If you build it, you will see that it is identical with it.
- Reduced. The basis is a reduced triad. The first and last sounds cover the interval of reduced septima.
- Increased. It is also called large enlarged. The basis is an increased triad. The first and last sounds cover a large septima.
What is an introductory seventh chord?
This seventh chord is built on all levels of the fret. You probably know the dominant seventh chord. It is built on the fifth step. The seventh chord of the second step, which does not have a special name, is also familiar to everyone.
But the four-sounding chord, built in harmony at the seventh step, has its own name - the introductory seventh chord. He received it thanks to the stage on which it is being built. It, in fact, is an introductory one, since it is very unstable and very tends to tonic.
Varieties of the introductory seventh chord
There are two types: small and reduced.
The small introductory seventh chord in structure and sound is equal to the small reduced (half-reduced). It is built only in natural major at the seventh step. It is based on a reduced triad. The first and last sounds of this seventh chord cover the interval of small septima. It is formed from two small thirds and one large or decreased triad and large third.
Its construction in F major natural: egbd. Mi (e) and re (d) are extreme sounds that form the interval of a small septim.
The reduced opening seventh chord in natural frets is not built. Its construction is possible in major and harmonic minor from the seventh step. At its core, as in the small introductory, is a reduced triad. The first and last sounds cover the interval of the septim reduced.
Its construction in F major harmonic: egb-des. Where des (D flat) is the sixth reduced step of harmonic major. And the world flat is the first and last sounds that make up the interval of reduced septima.
In harmonic G minor: fis-ac-es. Where fis is the seventh elevated level of harmonic minor. And fis-es are extreme sounds of the mind. 7.
Appeals and Permissions
The introductory seventh chord, like any other, contains three hits. These are the fifth quintext chord (6/5), the third quarter chord (4/3) and the second chord (2),
The seventh step quintsextaccord is designated VII6 / 5. Built on the second stage. VII6 / 5 minor in C major (n): dfah. VII6 / 5 reduced in C major (g): df-as-h. In A minor (g): gis-hdf.
Tertzkvartakkord of the seventh step is designated VII4 / 3. Built on the fourth step. VII4 / 3 minor in F major (n): bdeg. VII4 / 3 reduced in F major (g): b-des-eg. In D minor (g): gb-cis-e.
The seventh-second chord is designated VII2. Built on the sixth step. VII2 minor in G major (n): e-fis-ac. VII2 reduced in G major (g): es-fis-ac.
There are two options for resolving introductory seventh chords. The first is immediately in tonic. The second - through the dominant seventh chord in the tonic.
Thus, the introductory seventh chord consists of four sounds, which are located in large or small thirds. There are two types: small and reduced. They have the same treatment as all other seventh chords, only with the indication of the seventh step. Permissions come in two forms. Direct - immediately in tonic. And through chords the dominant group.