Wolfgang Kogert performs on the 1714 Sieber Organ at the Michaelikirche in Vienna, home of the perhaps lesser-known Gottlieb Muffat.. The organ underwent several invasive alterations before being appropriately restored by Jürgen Ahrend in 1987. It is the largest Baroque organ in Vienna. The Tracker raves, "Wolfgang Kogert is a fine performer and his sensitive and musical playing brings these beautiful works to life." Of the Toccata decima quinta: "...hauntingly beautiful, and it is worth buying the CD in order to hear it," (Vol. 54 No. 2, pages 31-33). Georg Muffat Toccata septima Toccata duodecima et ultima Passacaglia Gottlieb Muffat From Missa in F, in alternatim with Gregorian ChantKyrieGloria Toccata undecima, in alternatum with the Magnificat Primi Toni Toccata decima quinta Capriccio decimo quinto, "desperato" Canzona XI