https://github.com/gogins/csound-extended/tree/develop/haskell
Also see: https://micha.elgogins.tumblr.com/post/188345210028/algorithmiccompositionsystems.
This longish post has links to numerous algorithmic composition
systems, examples of pieces for many of the system, and my usual rant
about music programming.
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Michael Gogins
Irreducible Productions
http://michaelgogins.tumblr.com