Technological progress is revolutionizing the translator’s profession. After word processing and computerized translation assistance tools, surtitling is increasingly coming to the fore. This paper addresses the problems involved in the evaluation of surtitling according to four parameters: the original (film, theatre, opera); the method: surtitling or subtitling; the translation system (slide projection, software system) and the quality of the translation, based on a case study containing examples of Wagner’s opera Parsifal.