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Project Description

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.

System Requirements

System requirement is not defined
Information regarding Project Releases and Project Resources. Note that the information here is a quote from page, and the downloads themselves may not be hosted on OSDN.

2009-03-29 18:54

This release fixes a serious bug. Previously, Strasheela only worked when IOzSeF (an Oz extension for constraint solvers) was installed. It simplifies the installation on Windows by providing an installation batch file. It also adds a collection of ready-made constructors for musical segments such as contrapuntal lines, homophonic chord progressions, or specific motifs, and adds a number of harmony-related constraints. Further additions and bugfixes have been made as well.
Tags: Serious bugfix

2009-03-10 01:06

This release brings many small-scale improvements and extensions to Strasheela. Most importantly, the implementation of Schoenberg's Theory of Harmony as CSP has been documented (HTML with sound examples), Strasheela now supports adaptive just intonation, the music representation has been extended by several convenient constructors, and a number of pattern constraints have been added. Also, some bugs have been fixed.
Tags: Minor feature enhancements

2008-12-04 17:25

This release fixes a serious bug which even caused
a compilation error. In order to avoid such errors
in the future, the code has been cleaned up, and
virtually all compiler warnings are now fixed as
well. In addition, the tutorial revision
continued, and some distribution strategies have
been optimized.
Tags: Major bugfixes

2008-11-28 08:53

This release improves sound synthesis format export. For example, expressive timing of scores can be defined by time shift functions. Predefined MIDI file export also supports non-note events like continuous controllers (e.g. pitch bend, aftertouch, and CC) and a global tempo curve. Additional examples have been added, and further extensions and bugfixes have been made.
Tags: Minor feature enhancements

2008-08-20 03:41

This release supports new techniques for constraining the musical form, and demonstrates them in examples. Also, the definition of complex distribution strategies (variable orderings in the search) is simplified by special constructor functions. Several further examples have been added, and many other extensions and bugfixes have been made.
Tags: Minor feature enhancements

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