Ricercare a 3 from The Musical Offering, BWV.1079 (Sauer)
Baroque. Bach's Ricercare a 3, from The Musical Offering, BWV 1079, is a collection of canons and fugues based on a single musical theme given to Bach by Frederick the Great of Prussia. The Ricercare a 3 is a three-voice fugue, a close cousin to the six-voice ricercare from the same collection. -the publisher