from "Die Kunst der Fuge" BWV 1080 - Contrapunctus I by J. S. Bach.
It consists of a fugue for four voices and presents the theme for direct movement.
Arrangement for organ by Alessandro Esposito (II volume Pagine organistiche Ed. Carrara Italy)
In 1751 came the printed edition, edited by Carl Philipp Emanuel Bach's Die Kunst der Fuge (The Art of Fugue), BWV 1080, the last opera composed by Johann Sebastian Bach (1685-1750).
The Art of Fugue is the final contribution to a group of works by a single theme concept composed the last decade of Bach - Goldberg Variations BWV 988 (1742), the Musical Offering (1747), Variations on canonical Von Himmel hoch BWV 769 (1748).
Subsequently, I will share the same piece played on a different sample for comparison. ;-)