https://www.rundel.de/read_and_listen/1152

Trumpet Voluntary / Trumpet Tune: The arrangements of these baroque works followed the principle of individual voices being as independent as possible. No part should be given the function of a filler voice, each instrument should - as far as the brevity of the pieces allowed - be equally involved in the musical process. This is shown not least in the fact that the first and second voices alternate in leading the melody, while the fourth and fifth vo...