.. _about:


Authors, Acknowledgments, Contributing, and Licensing
=====================================================

Music21 is an open-source toolkit for Computer-aided musicology.  It is licensed under the LGPL (see below).

About the Authors
-----------------------

**Michael Cuthbert**, the creator of music21,  is Homer A. Burnell Associate Professor of Music at M.I.T.  
He received his A.B. *summa cum laude*, A.M. and Ph.D. degrees from Harvard University.   
Cuthbert spent 2004-05 at the American Academy as a Rome Prize winner in Medieval Studies,
2009-10 as Fellow at Harvard's Villa I Tatti Center for Italian Renaissance Studies 
in Florence, and 2012-13 at the Radcliffe Institute.  
Prior to joining the M.I.T. faculty, Cuthbert was on the faculties of Smith 
and Mount Holyoke Colleges.  He has worked extensively on computer-aided musical analysis,
fourteenth-century music, and the music of the past forty years.  He has published
on computer-aided treatment of fragments and palimpsests of the late Middle Ages and 
on set analysis of Sub-Saharan African Rhythm and the music of John Zorn. In addition to
work on music21, Cuthbert is currently writing a book on sacred music in Italy during the 
age of the Black Death and Great Papal Schism.

**Christopher Ariza** is Lead Programmer of music21 and Visiting Assistant Professor of Music
at M.I.T.  Prior to joining the music21 project, Ariza was Assistant Professor of Music
Technology at Towson University in Baltimore.  He has published and presented numerous articles 
and papers on algorithmic composition and generative music systems.  Ariza received his A.B.
degree from Harvard University and his M.A. and Ph.D. degrees from New York University.








Acknowledgements  
----------------

Funding
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The music21 project was made possible by generous research funding from the **Seaver Institute**.

In addition, we acknowledge consistent support from `M.I.T.`_, the 
`School of Humanities Arts and Social Sciences`_, and the `Music and Theater Arts`_ section.

.. _M.I.T.: http://web.mit.edu/
.. _School of Humanities Arts and Social Sciences: http://shass.mit.edu/
.. _Music and Theater Arts: http://web.mit.edu/mta/

Colleagues and Institutions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Music21 is unthinkable without our colleagues and friends working on other music and technology
projects, in particular:

* `David Huron`_, inventor of `Humdrum`_, the inspiration for music21.

* The `Center for Computer-Assisted Research in the Humanities`_ at Stanford University,
  contributing to the knowledge of music since 1984, and publishers of *Computing in Musicology*.

.. _David Huron: http://www.musiccog.ohio-state.edu/Huron/
.. _Humdrum: http://www.musiccog.ohio-state.edu/Humdrum/
.. _Center for Computer-Assisted Research in the Humanities: http://www.ccarh.org/

Contributors
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Additionally, the following individuals have contributed materials or knowledge to this project.  
Their contributions and generosity are greatly appreciated.

* `Donald Byrd`_, researcher on University of Indiana who created a schema for computer-aided musicology 
  (along with the source of all sorts of examples of how music notation is difficult).

* `Jack Campin`_ has kindly given permission to distribute his ABC editions of the Aird Collection, the Northumbrian Minstrelsy, and the Colonial and Civil War American Fife Music Collection. 

* `John Chambers`_ has provided ABC editions to distribute with music21, including the Aird Collection, the O'Neill's Music of Ireland Collection, and Ryan's Mammoth Collection of fiddle tunes.

* `Laura E. Conrad`_ has kindly given permission to distribute her ABC editions of renaissance polyphony from Serpent Publications.

* `Ewa Dahlig-Turek`_ has kindly given permission to distribute the Essen folksong database with music21.

* `Michael Good`_ and Recordare.com for creating MusicXML and many discussions about the project.

* `Margaret Greentree`_ has kindly  given permission for distribution of her edited collection 
  of the Bach chorales in MusicXML format as part of the music21 corpus. 
  Her website contains all these chorales in additional formats.

* `Walter B. Hewlett`_ and The Center for Computer Assisted Research in the Humanities (CCARH) have kindly given permission for distribution of musedata encoded files.

* `Justin London`_ compiled and maintained the list of Second-Viennese row forms now available in serial.py.

* `Manuel Op de Coul`_ has kindly gave permission to use the Scala scale archive of nearly 4000 scales in music21.

* `Craig Sapp`_ has always been generous in discussions about MIR and has been a great collaborator.

* `Seymour Shlien`_ has kindly given permission to distribute his ABC encodings of the Essen folksong database with music21.

* `Bryen Travis`_ has kindly gave permission to use his collection of Bach MIDI data in music21.

.. _Donald Byrd: http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm
.. _Laura E. Conrad: http://www.serpentpublications.org/
.. _Michael Good: http://www.recordare.com
.. _Margaret Greentree: http://www.jsbchorales.net
.. _Justin London: http://www.people.carleton.edu/~jlondon/2ndviennese.htm
.. _Walter B. Hewlett: http://www.ccarh.org
.. _Craig Sapp: https://ccrma.stanford.edu/~craig/
.. _Bryen Travis: http://www.bachcentral.com/
.. _Ewa Dahlig-Turek: http://www.esac-data.org
.. _Seymour Shlien: http://ifdo.pugmarks.com/~seymour/runabc/esac/esacdatabase.html
.. _Manuel Op de Coul: http://www.huygens-fokker.org/scala
.. _John Chambers: http://trillian.mit.edu/~jc/music/book
.. _Jack Campin: http://www.campin.me.uk/








How to Contribute
-----------------

We are always interested in working with interested musicologists, programmers, psychologists, composers, game-designers,
performers, amateur music enthusiasts, etc.  In particular, we're interested in hearing about how music21 helped you
advance your work ... or in problems with music21 itself or contributions you've made.  

You can contact the larger music21 community through the `music21 list`_, or email the authors (at our last names @mit.edu).

.. _music21 list: http://groups.google.com/group/music21list

In particular, if you are interested in contributing documentation, tests, or new features to music21, 
please contact the authors. 





Licensing and Copyright
---------------------------------


The music21 Toolkit
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Music21 is Copyright (c) 2010, the music21 Project (Michael Scott Cuthbert, Principal Investigator).  Music21 code (excluding content encoded in the corpus) is free and open-source software, licensed under the Lesser GNU Public License (LGPL).
The complete license is included as music21/license.txt and can be found at the following URL:

  http://www.gnu.org/copyleft/lesser.html

While you're legally bound by the rules above, in a nutshell here's what the LGPL means: 
You can download music21 for free, give a copy of it to your friends, make your great discovery about Buxtehude
or Britney with it and owe us nothing.  (Though [sniff, sniff] I'd think a footnote of thanks to music21 in your 
eventual publication or on your website would be a pretty nice thing to do, no?  the authors also enjoy a nice scotch,
if you're feeling really generous).  You can even make money off of music21 by making your own projects that use it.

But there are some responsibilities you have: if you alter music21 itself, you must release it under the LGPL
license itself (note that we're bound by the same responsibility!) -- meaning your version must also be free and 
open source.  You can link to music21 in your own proprietary closed-source code.  
So if you want to make money off of a great closed-source software notation package that uses music21, go ahead! But 
the version of music21 distributed with your software must be editable by users.  So if you use music21 to provide
sound for a closed-source demonstration, I should be able to hack the version of music21 used by your demo to change 
the base tuning, etc.  In sum: linking to music21 in closed-source applications = good.  embedding/altering music21 
itself in closed-source apps = illegal.


The music21 Corpus
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The LGPL music21 software is distributed with a corpus of encoded compositions which are distributed with the permission of the encoders (and, where needed, the composers or arrangers) and where permitted under United States copyright law. Some encodings included in the corpus may not be used for commercial uses or have other restrictions: please see the licenses embedded in individual compositions or directories for more details.   

To the best of our knowledge, the music (if not the encodings) in the corpus are either out of copyright in the United States and/or are licensed for non-commercial use. These works, along with any works linked to in the virtual corpus, may or may not be free in your jurisdiction. If you believe this message to be in error regarding one or more works please contact Michael Cuthbert at the address provided on the contact page.












