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Resumo
No seguinte artigo, apresentamos um sistema interativo para improvisação musical não idiomática. A abordagem geral assume que um músico improvisando nesse contexto não restringe os elementos de sua linguagem musical a um alfabeto fixo, evita gramáticas pré-estabelecidas, concentra-se na articulação e continuidade do fluxo musical através da constante antecipação de elementos futuros. Usando técnicas de classificação de áudio, mapeamos cada frase tocada e as transpomos em um espaço vetorial que representa características texturais. O sistema então prediz continuidades possíveis para a sequência em curso e reinjeta segmentos passados segundo instruções (controladas manualmente) para “contrastar” ou “seguir” as predições. O sistema foi testado com um saxofonista profissional e demostrou ser um ambiente de improvisação coerente e reativo, além de apontar para possibilidades de futuras ampliações.
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