The unconscious mind is way extra suited to creative perception than the conscious mind. Ideas are free to recombine with other ideas in novel patterns and unpredictable associations. It can be the storehouse of everything you understand, including things you’ll be able to’t readily call into consciousness.

However, not all of the early work on composition relies on probabilistic approaches. Moorer’s program generated easy melodies, together with the underlying harmonic progressions, with easy inside repetition patterns of notes. This strategy depends on simulating human composition processes using heuristic strategies rather than on Markovian probability chains.

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The lack of interactivity, with a human improviser, of the above approaches has been criticized on the grounds that they remove the musician from the bodily and spontaneous creation of a melody. Although it is true that the most basic characteristic of improvisation is the spontaneous, real-time creation of a melody, it is also true that interactivity was not intended in these approaches and nonetheless they could generate very interesting improvisations. Thom along with her Band-out-of-a-Box system addresses the issue of real-time interactive improvisation between BoB and a human player. Thom’s method follows Johnson-Laird’s psychological theory of jazz improvisation. This …