Contrapunctus 12, from Art of the Fugue, BWV.1080 (Sauer) [211.01]
Baroque. Contrapunctus XII is a four-voice, mirror fugue in 3/2 meter—the only fugue in this meter. It uses the original “Art of Fugue” theme in the “Rectus” and then all the voices are turned upside down in the “Inversus.” About 5 minutes in length. -the publisher