The computer is founded on a principle of generalized equivalence. Indeed the world to be considered computerly must be reduces numerically to the calculable data and coded. Because of this axiomatic reduction to a common language all data can be translated in any other. This infinite translation reiterates the westen fantasize of a mathesis universalis in an universe, the one of the computer, that doesn't need to confront itself to an external world since all occurs on a screen. MY LAST TAPE proposes ironic way to spread until the absurd the domain of this translation. I scan a text, The last tape of Samuel Beckett. I change the .TXT extension of the file for the .PRG extension, used for files under COMMODORE 64. With a program of conversion I translate this file in an audio file that I reproduce on a magnetic tape that I play on an old computer COMMODORE 64. Between the choice of the text, as arbitrary as the mathesis computer universalis, and the final product, a tapea double curls is achieved. What is it that the translation and the relation between the analogical and the numeric?