An augmented seventh interval, built upon the most dissonant seventh, shares this characteristic with the augmented third, augmented fifth, and augmented ninth; but it features the melodic and harmonic properties of the seventh and ninth simultaneously, making it a popular yet complex interval in its use in both chromaticism and atonality.
The Augmented Seventh Interval: An In-Depth Structural Analysis
The augmented seventh interval, a dissonant musical interval, is renowned for its distinctive and captivating sound. Understanding its structure is crucial for musicians seeking to employ it effectively in their compositions.
Interval Structure
The augmented seventh interval encompasses a span of seven half steps. From the first note to the second, it expands by 11 semitones, or a perfect octave plus a major third. This wide interval produces a sharp, biting dissonance that demands resolution.
Example: Major Key
In the key of C major, the augmented seventh interval is found between the notes B and G♯. The interval spans seven half steps, represented as:
B - C - C♯ - D - D♯ - E - F - G♯
Interval Quality
The augmented seventh interval is classified as a dissonant interval. Its wide span and strong dissonance create a sense of tension and instability.
Inversions
The augmented seventh interval can be inverted into three other forms, each with its own unique sound:
- First inversion (diminished second): G♯ to B♭
- Second inversion (minor sixth): F to G♯
- Third inversion (major third): E to G♯
Interval Types
The augmented seventh interval can be categorized into two main types:
- Diatonic augmented seventh: Formed within a major scale, such as the interval between B and G♯ in C major.
- Augmented seventh chord: A four-note chord built upon the augmented seventh interval, often used in jazz and classical music.
Table of Augmented Seventh Intervals
The following table summarizes the augmented seventh intervals in major and minor keys:
| Key | Augmented Seventh Interval |
|---|---|
| C major | B to G♯ |
| A minor | C♯ to G |
| D major | E to B♭ |
| B minor | F♯ to C |
| G major | A to F♯ |
| E minor | B to G |
Note Progression
The augmented seventh interval typically resolves by moving down one half step to a major sixth. This resolution is considered “strong” due to the close proximity of the notes. Alternatively, the interval can ascend to a minor seventh, a “weak” resolution.
Composing with the Augmented Seventh
When using the augmented seventh interval in compositions, consider the following tips:
- Employ the interval sparingly for maximum impact.
- Use the interval to create tension and release.
- Experiment with different inversions and voice leading.
- Resolve the interval clearly and effectively.
Question 1:
What is the defining characteristic of an augmented seventh interval?
Answer:
An augmented seventh interval is a musical interval encompassing seven semitones, with the upper note augmented by one chromatic semitone.
Question 2:
How does an augmented seventh interval relate to its constituent notes?
Answer:
An augmented seventh interval consists of a major third followed by an augmented fourth, or alternatively, a minor seventh followed by an augmented second.
Question 3:
What is the effect of augmenting the seventh interval?
Answer:
Augmenting the seventh interval creates a dissonant and unstable sound, making it a common feature in jazz, classical, and contemporary music.
Thanks for hanging out while I chattered away about those fancy-pants augmented seventh intervals. I hope you found this little brain dump informative or at least mildly entertaining. If you’re still curious about the world of spicy chords and musical shenanigans, swing by again sometime. I’ll have another musical adventure cooking for you soon. Until then, keep your ears open and your heart singing!