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Freud chose hearing as a vector of the treatment when he invented the psychoana-lytic technique. This article is focused on the importance of this sensory modality, from the baby in his cradle to the standard treatment. Freud also noted the periodicity of the mind’s in-take of information from the external world. The passing of time, duration, depends on the linking of events between themselves and, in particular, of auditive events which only acquire meaning in this period of time. Tempo, a regular beat, the expression of periodicity, is related to the notion of “vital/identital” put forward by Michel de M’Uzan, whilst melody or rhythm are anchored in the sexual.