Note 132 — THE CHORALE PRELUDES (VORSPIELE)—TRIOS—FANTASIAS—FUGUES
Wallace Goodrich translation
Organists often played the sortie (postlude) in the form of a chaconne, with full organ (see Mattheson: "Der vollkommene Capellmeister," and Becker, "Rathgeber für Organisten"). The prelude to the chorale "Heut' triumphiret Gottes Sohn" is conceived in the same manner.