Nonaccord. Nonchord inversions.

What chord begins the famous jazz composition “Girl from Ipanema”?

A non  -chord is a chord that consists of 5 notes arranged in thirds. The name of the chord comes from the name of the interval between its upper and lower sounds – nona. The number of the chord also indicates this interval: 9.

A nonchord is formed by adding a third from above to a seventh chord, or (which leads to a similar result) by adding a none to the root note of the same seventh chord. If the interval between the lower and upper sound is a big nona, then the non-chord is called big . If the interval between the lower and upper sound is a small non, then the non-chord is called small .

Dominant nonchord

The most widespread are non-chords built on the II and V steps. A non-chord built on the fifth step is called a dominant non-chord (built on the dominant). Please note: there is an analogy with seventh chords (recall that the most common seventh chords are seventh chords built on the II and V steps); the seventh chord at the fifth degree is called the dominant seventh chord. Knowing the analogy, it’s easy to remember.

A non-chord is a dissonant chord. The dominant nonchord is an acoustically correct dissonance.

Figure 1. Nonchord example (C9)

Nonchord inversions

In any inversion of a nonchord, the nona must always be on top.

• The first appeal is called the sixth seventh chord and has a digital designation ⁶ / ₇ .
• The second inversion is called a quarter-quint chord and is _denoted ^4/5 .
• _{The third} inversion is called the second tertz chord, denoted ^2/3 .

Nonchord Permissions

A large nonchord resolves into a major triad. A small non-chord resolves into a minor triad. In both cases, two notes are missing, since the nonchord contains 5 notes, and the triad contains three. The following are the resolutions of nonaccord calls:

• The first inversion resolves into the main tonic triad.
• The second inversion resolves into a seventh chord of a tonic triad.
• The third inversion resolves into a sixth chord of the tonic triad.

Practice

These chords are widely used in jazz and blues compositions. They give the melody a relaxed, lyrical mood, a hint of a slight understatement.

Results

Now you have an idea of ​​what a nonchord is.