Dietrich Buxtehude's Magnificat noni toni, BuxWV205 is based on plainsong called the tonus peregrinus. There are two verses, the first, vocal in character, having the melody (in long notes marked ‘tremolo’) in the pedals, the second a fantasia based on the melody’s first three notes (minims) to which Buxtehude adds a lively counter-subject.
