...I wonder, though, what members think about slowing down at the ends of movements in music of this period. Was it actually regarded as a tasteful thing to do in those times? I don't recall ever seeing any primary literature on the subject, being but an enthusiastic amateur of baroque music.
Slowing down in Baroque music at the ends of movements has always been a bone of contention. The default assumption by modern players (especially those used to later repertoires) is that one must always do it. This is probably not a false assumption, but the question is: if so, by how much?
There are basically two differing kinds of "slowing down": a) some time before the end a deliberately-paced rallentando is imposed that signals, well in advance, that at an easily-calculable distance into the future the piece will come to a definitive end; and b) one that a
performer applies (perhaps out of courtesy to the listeners) that merely pinpoints the arrival of the final cadence/chord as a point of structure. In the former, a
rallentando has been applied strategically so as to become itself an indispensable
part of the structure of the piece. As such it is customarily actually specified by the composer, together with other elements of articulation or dynamic. In the latter it is often the case that no indication of slowing down is given by the composer, but that a slight easing of tempo is applied merely to signal the definitive arrival of the end of the movement. It is, of course, the latter case that applied to Baroque music since nobody at that time every (at least to my knowledge) indicated the directions
rit. or
rall.However, there were other means composers had of signalling a wish to slow down. Many Baroque pieces (the obvious example being the infamous Bach D Minor Toccata BWV 565) apply terms like "Largo" or "Adagio" for the last bar or so, implying (in some way) a definite slowing down, or relaxation of pace. 17th-century English musical sources also use the English term
drag to indicate a slowing of pace.
There are some interesting citations in Robert Donington's
The Interpretation of Early Music, two pages of which appear below:
These might be of some help, but in the end I feel that a player's sense of "good taste" has the final word. Unfortunately many players seem to lack this (!) and we are none the wiser.
Baz