What is the interval between the sixth and seventh degrees of a harmonic minor scale?

In a harmonic minor scale, the sixth and seventh degrees create a specific interval that is crucial for establishing the scale's unique sound. The harmonic minor scale is constructed by raising the seventh degree of the natural minor scale, which changes the relationship between the sixth and seventh degrees.

To examine the interval between the sixth and seventh degrees in a harmonic minor scale, we can look at the whole scale. For example, in A harmonic minor, the notes are A, B, C, D, E, F, G#, and A. Here, the sixth degree is F, and the seventh degree is G#. The distance between F and G# is what determines the interval.

This interval is a diminished seventh. This is because, when counting half steps, F to G is a whole step, and G to G# is a half step, giving a total of 10 half steps from F to G#. By interval naming conventions, a diminished seventh occurs when the distance between the two notes is 10 half steps, which fits perfectly in this context.

Understanding the structure of the harmonic minor scale is essential, as it signifies the use of this raised seventh degree to create a leading tone that resolves back to the tonic, contributing to the harmonic tension