Gorgeous though the chaconne is, my enjoyment has been hampered by my inability to figure out the rhythm. All classical performers insist on doing extremely expressive (read: loose) timekeeping. I don’t have the sarabande rhythm internalized well enough to be able to track it through everybody’s gooey rubato. Bach’s rhythms are complicated enough to begin with. He loves to start and end phrases in weird spots in the bar (the very first note of the piece is on beat two) — so, I needed some help finding the beat.
So that’s why when the “Jello dries up,” so to speak, it makes it very difficult to make fast vibrations, thus resulting in the inability to hit higher notes, cracking, or the inability to produce any sound at all. Moral of the story: Hydrated vocal folds are happy vocal folds!