He even wrote lyrics.

butt song from hell

this is the butt song from hell

we sing from our asses while burning in purgatory

the butt song from hell

the butt song from hell

butts

Oh, glory is to live in a wonderful age of niche investigative collaborations. Now if only someone recorded this on those Bosch Hell instruments Oxford musicologists built IRL.

UPDATE: Preseting, Kent Heberling‘s “Ancient Ass Music – Hieronymus Bosch’s 500 Year Old Butt Song From Hell” the METAL VERSION, “recorded in a day” with his “trusty ESP LTD EC-1000, Fender Jazz Bass, Line6 Pod X3L, East-West Quantum Leap Orchestral VST, Fruity Loops, and Sonar.” Your move, internet. (Vocals???)