Analyse-Synthese team performs research on various voice transformations, transformation of gender, of age, of nature, of accent, ..., particularly in VIVOS and Affective Avatars projects. In this video, the four characters voices were produced from the one of one actor by transformation of gender and age. Those transformations are made thanks to the team's softwares: Super-VP and VoiceTrans. They are "real-time" in the sense that they can be applied when one is speaking or singing in the mike (SuperVp-Trax executable). The applications are in video games, cinema, animated movies, avatars,...