Mozart's Melodic Curve
Ascends and Descends
The Rise In Sound
In the Solo work by Mozart
is one form of minor scale
the harmonic minor to descend
and natural pure or primitive form
to descend (into Dante's Inferno?)
It is important to have the semi-tone between the seventh and eighth interval in the ascending pattern because that is how it is written by Mozart. The descending pattern is one tone below the perfect 8th. Between the 7th and 8th tone interval there is a tone difference in the primitive/natural form to create what is known as a blend. It is too abrupt to use the harmonic minor to ascend and descend in the Mozart's melodic curve mode.
The natural or primitive form is when you use a tone distance instead of semitone to descend from the perfect 8th.
The natural scale A G F E D C B A for the key of A minor. (gets much more detailed here this is for beginners). Prof Jones is awaiting any comments!