(Photo: Georg Lichtensteger in 1745) At St. Michaelis Church Hamburg, with its vast interior and long reverberation, opening concerts of the Bach Weeks often feature works that exploit the acoustic space—Biber’s 53-part “Missa Salisburgensis” was a perennial choice, and this year is no exception. Telemann’s oratorio “Komm wieder, Herr, zu der Menge der Tausenden in Israel,” written for the 1762 {…}