Fantasia in G BWV572 (8Pos) Bachs Fantasia in G BWV 572 was most likely composed before 1712 and was originally for Organ. It survives thanks to his students who transcribed many of his works during the years before 1723. The original work is in three movements, however in this setting Mr. Sauer has used the Grave central movement which is slow, dense and serious. In this work Bach departs from his previous style of writing music that is interchangeable between the Organ and Harpsichord. Mr. Sauer has done a masterful job of scoring this 5-voice work for an eight-part Trombone Ensemble of moderately advanced performers.