Zachow wrote a fugue, based on the first phrase on the chorale melody of "Mit Fried und Freud". Not an easy subject for a fugue as it moves two quints up in just five notes. Zachow shows his mastery in pulling it of almost effortlessly.
The recording was done with the Hauptwerk software and the sample set of the Mascioni of the parisch church in Azzio, made by Piotr Gabrowsky.
Free score available here: partitura.org/index.php/friedrich-wilhelm-zachow-mit-fried-und-freud/