Chorale fantasia
Chorale fantasia is a type of large composition based on a chorale melody, both works for organ, and vocal settings, for example the opening movements of Bach's chorale cantatas, with the chorale melody as a cantus firmus. == History == Chorale fantasias first appeared in the 17th century in the works of North German composers such as Jan Pieterszoon Sweelinck (who arguably had the greatest influence on the genre), Heinrich Scheidemann and Franz Tunder (who, however, rarely used the term).