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A finales de la década de 1950, entidades culturales como el Aula de Música del Ateneo de Madrid o el Servicio Nacional de Educación y Cultura comenzaron a prestar especial atención a la música de vanguardia. A través de una línea de actuación compartida, estas y otras instituciones contribuyeron a legitimar a los jóvenes compositores españoles —la Generación del 51— situándolos en línea con las últimas tendencias de la música europea. En el contexto del desarrollismo franquista, esta promoción respondió a un interés estratégico más amplio a la hora de ofrecer una visión de España como sinónimo de modernidad, subrayando la calidad técnica y formal de las obras y minimizando sus posibles aspectos ideológicos. En el presente artículo abordamos el estudio del discurso construido en torno a la vanguardia por parte de dichos compositores y de la crítica musical, centrándonos en dos publicaciones oficiales vinculadas a las citadas instituciones: La Estafeta Literaria y Aulas. Educación y Cultura.

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The article examines perceptual aspects of timbre within the context of avant-garde XX century music. An excerpt from a work by Luciano Berio was taken into account. We recorded it on 8 separate channels each of them devoted to small groups of homogeneous sounds, in order to obtain a global result that we could modify by subtracting one or more of the recorded groups. We prepared four different excerpts: one with the original version and three with modified versions. 50 participants (25 experts, 25 non-experts) were invited to fill in a semantic differential bipolar scale made of 12 adjectives, 6 concerning emotional and 6 sensorial aspects of perception. We interpreted the subjects’ responses with the help of a spectrographic analysis and of studies on timbre verbalization. The main aim of our research was to explore the possibilities of timbre analysis, a field that so far has no solid scientific background. The research obtained promising responses from expert listeners, while non-experts manifested a sort of aesthetic refusal of this genre of music. Positive results were obtained also in the critical observations of possibilities and limits of spectrographic analysis and verbalizations of timbre. We hope that our initial data can be useful for future studies on timbre perception.