Keywords: Speth-ars-magna-cover.png Title page of Johann Speth's Ars Magna Augsburg 1693 Liner notes to Johann Speth - Ars magna consoni et dissoni - Complete Organ Works Rupert Gottfried Frieberger organ Ingemar Melchersson organ MDG 606 0727-2 2009-03-26 own work scan PD-old Johann Speth |