Bach wrote this for flute and continuo (cembalo), but I thin it’s fun to play with trumpet and tuba (or trombone/euphonium). I wrote it in C and G major.
Here a link to the original score
Bach-1033-Allegro-in-C Bach-1033-Allegro-in-GOnly the trumpet part of Allegro in various keys:
Bach-1033-Allegro-in-various-keys