Topmusicanswers
To invert a Compound Interval, the movement of two octaves can happen by any one of the following:
- Moving the Lower Note two octaves higher.
- Moving the Higher Note two octaves lower.
- Moving the Lower Note one octave higher and moving the Higher Note one octave lower.
- What is interval inversion?
- What happens when an interval is inverted?
- What is the formula for simple interval inversion?
- What are compound intervals?
What is interval inversion?
An interval is said to be inverted when one of the notes is moved up or down an octave. In the example below, the minor third (b-d) becomes a Major sixth when the b is moved up an octave. Any interval can be inverted and the following table is always true for interval inversions: Original Interval.
What happens when an interval is inverted?
Whenever you invert a perfect interval it becomes the opposite perfect intervals. For example, if you were to invert a perfect 4th it would become a perfect 5th and vice versa, when you invert a perfect 5th it becomes a perfect 4th.
What is the formula for simple interval inversion?
The formula for converting regular intervals to inverted ones, and vice versa, is: 9 – (interval) = (inverted interval). If the interval is major/minor, or augmented/diminished, you must flip its quality. Major becomes minor, augmented becomes diminished, perfects stay perfect.
What are compound intervals?
COMPOUND INTERVALS: Compound intervals are intervals larger than an octave. Compound intervals are functionally the same as the corresponding simple intervals (those an octave or less in size). Thus, a 9th is a compound 2nd, a 10th is a compound 3rd, an 11th is a compound 4th, a 12th is a compound 5th, etc.
