[LAA] Strasheela 0.9.9 released

Torsten Anders torsten.anders at plymouth.ac.uk
Mon Mar 9 07:46:44 EDT 2009

Dear all,

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.

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 be extended by several convenient  
constructors, and a number of pattern constraints have been added.  
Also, some bug fixes have been made.

For more information on Strasheela, please visit

Changes are described at

This release can be downloaded from:


Torsten Anders
Interdisciplinary Centre for Computer Music Research
University of Plymouth
Office: +44-1752-586219
Private: +44-1752-558917

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