In this article, I expose some fundamentals of the creation process of the theatrical show Outside, a musical noir, staged by Toque Cia de Teatro in 2011, of which I highlight the dialogue between Music and Theater as the main foundation. I bring notes that emerged from my participation as a creative artist and reports from other artists involved in the editing, which compose a polyphonic memory intertwined by the voices of the actors-musicians, the director, the playwright, and the musical director, without hierarchies between them. Finally, I describe scenes of this theatrical show, performed in a collaborative process of creation, particularly in its musical aspects.En este artículo expongo algunos fundamentos del proceso de creación del...