music21
music21 -- A Toolkit for Computational Musicology
For more information, visit: http://web.mit.edu/music21
And to install, see: http://web.mit.edu/music21/doc/installing/install.html
Copyright © 2006-2015 Michael Scott Cuthbert and the music21 Project
Released under either the BSD (3-clause) or GNU LGPL license according to your choice. See LICENSE.