3. Harmonic and Melodic Minor Scale
This leading tone’s tendency leading to the tonic is especially compelling at the end of music. The music usually ends with the tonic, confirming the original key of the piece, and a leading tone is a good tool to inform listeners that the end is coming. A harmonic minor scale employs the raised seventh scale degree, the leading tone. It now has a tendency, and the scale is named so because the scale members are preferably used in harmonic texture. A melodic minor scale employs the raised sixth and seventh scale degrees when it ascends in a melodic texture to avoid an augmented second between the sixth and seventh scale degree, and it goes back to the normal when it descends like a natural minor because it is going down and not leading to the tonic.
No leading tone? Does a natural minor scale have less value than the other two minor scales with leading tone?
No, it is not about which scale is better than the other. Every scale has its own property, character, and color. For example, the song, “Greensleeves,” written in natural minor, stands for its untouched and natural flavor.