This essay deals with the relationship of mathematics and music in Vilém Flusser’s work, an aspect that has not received the attention it deserves. Related issues are the complex dialectics of sound, number, image and word as well as the relationship of hearing and seeing. The essay focuses on two texts written 22 years apart but closely connected to each other: The History of the Devil and Into the Universe of Technical Images. This makes it possible to illustrate the inner (...) coherence of the whole oeuvre and the persistence with which Flusser kept returning to the same central issues of his thinking and writing. In the context of the issue discussed here, this leads to an all-encompassing synthesis of several diverging aspects. In the new computerized technical images mathematics and music, the West and the East, art and science merge, the senses and the codes come together, the eye, the ear and the fingertips, the visual, the acoustic and the tactile converge and fuse creating a new unheard of and unseen multilingual, multi-mediatic and multi-discursive unity. (shrink)