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A4 Logic/Rule based

At some point in the music, there are more than one possibilities, the outcome of which is decided by means of preset rules, i.e. the musician cannot decide and must follow the rules.


  • If the weather is sunny, go to section B. Otherwise, go to section C.

Related patterns

  • A3 Multi-pass
  • A5 Choice based
  • A6 Topography dependent
  • A7 Geography dependent
  • A8 Time dependent

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