In the Melodic Form of minor scales, what happens to the 6th and 7th notes when going up?

In the Melodic Form of minor scales, when ascending, the 6th and 7th notes are both raised a semi-tone compared to the natural minor scale. This alteration helps to create a leading tone, which is the seventh note that leads back to the tonic, resulting in a stronger pull towards the resolution of the scale. Raising the 6th note also contributes to a smoother melodic texture and allows for a more uplifting sound in the context of melodies and harmonies typically used in the classical music tradition.

This adjustment is particular to the melodic minor scale as it is only applied when ascending; in descending passages, the scale reverts to the natural minor form, where the 6th and 7th notes are not raised. This distinction is important as it highlights the adaptability of minor scales in musical composition. Understanding this concept is crucial for anyone studying music theory, as it affects how melodies are constructed and how they are perceived in different musical contexts.