Sorge's first professional appointment was as court and town organist at Lobenstein, a position that he maintained until his death. Sorge was a prolific composer and not without recognition in his own day. But Sorge is best remembered today for his book Vorgemach der mus. Komposition which propounded the tertian structure of chords, a theory that is still used in the teaching of harmony today. Fifteenth member of the Mizler Society (immediately after Bach), Sorge came into bitter controversy with contemporary theorists Marpurg and Quantz.