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Abstract(s)
Com a problemática da interacção humano-máquina no processo composicional como pano de fundo, a presente dissertação prossegue três vectores simultâneos: (a) um portfolio de alguma da música que escrevi nos últimos dois anos, na qual fiz uso de (b) um conjunto de ferramentas de composição algorítmica assistida por computador que desenvolvi sincronicamente no mesmo período de tempo, por sua vez fruto de (c) uma reflexão sobre os conceitos subjacentes, aqui apresentada monograficamente. De entre as ferramentas desenvolvidas destaca-se uma biblioteca em Common Lisp integrando funções relativas a operações combinatórias simples com vastas colecções de alturas e à exploração de propriedades geométricas de ciclos rítmicos e tonais, bem como um programa de manipulação de áudio com cadeias de Markov. A música escrita que integra este trabalho assume-se simultaneamente como ponto de partida e de chegada do percurso de investigação.
With the issues of human-machine interaction in the compositional process as a background, the present dissertation follows three simultaneous vectors: (a) a portfolio of some of the music that I wrote in the past two years, in which I applied (b) a set of computer-assisted algorithmic composition tools that I developed synchronously in that period of time, following (c) a reflection on the underlying concepts, presented here monographically. A library in Common Lisp stands out among the tools, including functions to perform simple combinatorics with large pitch collections and to the exploration of geometric properties observed in rhythmic and tonal cycles, as well as a program to manipulate audio using Markov chains. The written music—which is an integral part of this work—is simultaneously the point of departure and the point of arrival for the research path that I followed.
With the issues of human-machine interaction in the compositional process as a background, the present dissertation follows three simultaneous vectors: (a) a portfolio of some of the music that I wrote in the past two years, in which I applied (b) a set of computer-assisted algorithmic composition tools that I developed synchronously in that period of time, following (c) a reflection on the underlying concepts, presented here monographically. A library in Common Lisp stands out among the tools, including functions to perform simple combinatorics with large pitch collections and to the exploration of geometric properties observed in rhythmic and tonal cycles, as well as a program to manipulate audio using Markov chains. The written music—which is an integral part of this work—is simultaneously the point of departure and the point of arrival for the research path that I followed.
Description
Keywords
Composição algorítmica assistida por computador Common lisp Openmusic Pwgl Excentricidade e uniformidade rítmica e tonal Cadeias de Markov Computer-assisted algorithmic composition Rhythmic oddity Evenness Markov chains