Strasheela is a highly expressive constraint-based music composition system. Users declaratively state a music theory and the computer generates music which complies with this theory. A theory is formulated as a constraint satisfaction problem (CSP) by a set of rules (constraints) applied to a music representation in which some aspects are expressed by variables (unknowns). Music constraint programming is style-independent and is well-suited for highly complex theories (e.g. a fully-fledged theory of harmony). Results can be output into various formats including MIDI, Lilypond, and Csound. License: GNU General Public License (GPL) Changes: The output facilities to Lilypond are greatly revised in this release. Strasheela now outputs the format of Lilypond 2.10.0, supports various special cases (e.g. single staff polyphony, chords, enharmonic notation, and basic tuplets), and the customisation options have been extended. New examples demonstrate these features. In addition, this version facilitates composition in 22-tone equal temperament: various 22 ET chords and scales are provided, and output to Lilypond, as well as Csound, is supported. Other additions and bugfixes have been made to the system.

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