Performances of Johann Sebastian Bach's Magnificat come in three formats: 1. * D major version, BWV 243 with the twelve movements of that version; 2. * D major version, with the Christmas interpolations from the earlier version BWV 243a transposed and inserted after movements 2, 5, 7 and 9. 3. * E flat major version, BWV 243a. The difference with the previous format is not only the key signature, there are also differences in orchestration, e.g. in the earlier version flutes are not part of the tutti, so do not play in the choral movements 1, 7 and 12, and a trumpet solo in movement 10 instead of the later unison oboes. Other differences are minor, but there is for instance a slightly harsher harmony near the end of movement 4 in the earlier version.