In this paper we present an automatic Evolutionary Music Composer algorithm and a preliminary prototype software that implements it. The specific music composition problem that we consider is the so called unfigured (or figured) bass problem: a bass line is given (sometimes with information about the chords to use) and the automatic composer has to write other 3 voices to have a complete 4-voice piece of music. By automatic we mean that there must be no human intervention in the composing process. We use a genetic algorithm to tackle the figured bass problem and an ad-hoc algorithm to transform an unfigured bass to a figured bass. In this paper we focus on the genetic algorithm.
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