This paper presents a design of support system for musical
composition based on Simulated Breeding.
In our system named SBEAT3,
each individual in the
population is a short musical section of sixteen beats including 23
parts, thirteen solos, two chords and eight percussions.The melody
and rhythm are generated by a type of recursive algorithm from
genetic information. By selecting favorite piece among scores
displayed on the screen, the user listens to the sounds and decides
which should be theparents to reproduce the offspring in the next
generation. The genetic codes of children are generated through
mutation and crossover. Iterating this process, the user obtains
better pieces gradually. Embedding some domain specific functions,
such as changing tempo and selecting tones, we can build a useful
tool to make it easier for a beginner to compose his/her favorite
musical pieces.