This is a drum machine inspired by John Cage's 1987 composition As Slow as Possible aka ORGAN2/ASLSP, and its 639 year performance at St. Burchardi church in Halberstadt, Germany.
The sounds are recorded from a Roland TR-808, sourced from this very cool website from 1996.
It is the fourth entry in the 10,000 Drum Machines project by Maxwell Neely-Cohen.