Intimately bound up with the Lutheran tradition, Bach’s sacred cantatas defy a generalised description such is their infinite variety, wealth of musical invention and technical mastery. Remarkably Cantata No. 35 includes two instrumental Sinfonias almost transformed into organ concerto movements. In Cantata No. 55 a solo flute magically weaves itself around the vocal line. The other two cantatas, formerly attributed to Bach, are also distinctive for their delightful instrumentation.