A nice little three-part ricercare by Johann Pachelbel, in which he used a cromatic scale as its main theme.
Especially with the choosen meantone 1/6c temperament it is a very colourful piece, isn't it?
Part 1: Bovenwerk Pr8, O4
Part 2: Rugwerk Pr4,O4
Part 3: Hooftwerk: Pr16, Pr8, O4, Mix