Re: Bach keyboard concerto

"the original melody instrument was
the violin, because of the many violinistic figurations in the solo
part—string-crossing, open string techniques—all highly virtuosic."
The D minor key is a dead giveaway. It's the ideal key for the fiddle.
The D minor concerto is very interesting piece in its Sturm und Drang
and virtuosity. Unfortunately these are two (or rather three) things I
personally don't like much. However, there are enough people who do.