This question already has an answer here:
- Ornaments in J. S. Bach's 4th prelude 3 answers
I've got a question regarding the mordent over the two different notes with different realization in Bach's Partita No.4 Aria (as in the image). The first one starts from a note above while the second one starts on the main note. Is this because of the cadential 6-4 chord in which the dissonant note should be emphasized? Or, is it because of the reiteration of the mordented note in the previous bar?