Abstract

CARVAJAL RAMIREZ, Julio César  and  GIRALDO GIRALDO, Fabián Andrés. Composing music through genetic algorithms. Tecnura [online]. 2012, vol.16, n.33, pp.145-157. ISSN 0123-921X.

This paper presents a model of discrete musical composition based on musical writing techniques proposed by Johann Sebastian Bach. The model was implemented using the Meta-heuristics strategy, namely using Genetic algorithms implemented on the J Gap Framework, producing musical results with a syntax that matches writing and music composition techniques. This approach is applied to the natural musical scale, and also to synthesized sounds of the natural-piano octave. Chords were created by taking the corresponding grades in the scale; additionally, notes and chords were grouped to become actual score bars. Using the proposed model, the following is obtained: 1) A set of notes grouped in bars with their corresponding interpretation, following the guidelines of syntactic JFugue Framework; 2) the score of the fragments produced written on a stave that complies with the rules of formal notation. Three MIDI files corres-ponding to three compositions (made by the computer) are presented, showing a strong evolution of sound and, as such, an audible result of a song.

Keywords : genetic algorithms; artificial intelligence.

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