Four preludes from the Orgelbüchlein of J S Bach

BWV 625 Christ lag in Todesbanden [Christ lay in the bonds of death]
BWV 637 Durch Adams Fall ist ganz verderbt [Through Adam's fall are wholly ruined]
BWV 638 Es ist das Heil uns kommen her [Salvation has come to us]
BWV 643 Alle Menschen müssen sterben [All mankind must die]

This is the organ on which this was recorded:
http://nycago.org/Organs/Bkln/html/StMarkEpisCrownHts.html