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International Music Score Library Project
The IMSLP homepage as of May 2007
URL	http://www.imslp.org/
Commercial?	No
Type of site	Music score library
Registration	Optional (required for contributing)
Available language(s)	Dutch, English, French, German, Greek, Italian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish
Owner	IMSLP community
Created by	Feldmahler
Launched	February 16, 2006
Current status	Closed (October 17, 2007)

The International Music Score Library Project (IMSLP) was a project for the creation of a virtual library of public domain music scores, based on the wiki principle. Since its launch on February 16, 2006, more than 15,000 scores, for 9,000 works, by over 1,000 composers were uploaded, making it one of the largest public domain music score collections on the web.^[1] The project used MediaWiki software to provide contributors with a familiar interface.

The library consisted mainly of scans of old musical editions out of copyright. In addition, it admitted scores by contemporary composers who wished to share their music with the world by releasing it under a Creative Commons license. One of the main projects of IMSLP was the sorting and uploading of the complete works of Johann Sebastian Bach in the Bach-Gesellschaft Ausgabe (1851-1899).^{[citation needed]} Besides J.S. Bach's, Frédéric Chopin's nearly complete oeuvre was available on IMSLP.^{[citation needed]}

Besides providing a digital repository, IMSLP offered possibilities as a musicological encyclopaedia, since multiple and historical editions of a single composition could be uploaded, and musicological analyses and historical commentaries accompany the scores.

IMSLP had been officially recommended by MIT,^[2][3] which also used it extensively in some of its OpenCourseWare courses.^[4][5] It was suggested as a resource by university libraries at Oberlin Conservatory of Music,^[6] Manhattan School of Music^[7] Stanford University,^[8] McGill University,^[9] Brown University,^[10] University of Maryland,^[11] University of New Mexico,^[12] University of Washington,^[13] University of Wisconsin-Madison,^[14] California Institute of the Arts,^[15] and it had been submitted to MERLOT by a member professor.^[16]

On 19 October 2007 the IMSLP closed following legal threats from Universal Edition of Vienna, Austria.^[17] The cease and desist letter expressed concern that some works that are in public domain in the server's location in Canada with copyright protection of 50 years post mortem, but which are protected by the 70 years post mortem term in some other countries were available in those countries. The administrator of the website decided to close down the repository, but left the forums online so that discussions into the best way to proceed could be made:^[18]

On Saturday October 13, 2007, I received a second Cease and Desist letter from Universal Edition. At first I thought this letter would be similar in content to the first Cease and Desist letter I received in August. However, after lengthy discussions with very knowledgeable lawyers and supporters, I became painfully aware of the fact that I, a normal college student, has neither the energy nor the money necessary to deal with this issue in any other way than to agree with the cease and desist, and take down the entire site. I cannot apologize enough to all IMSLP contributors, who have done so much for IMSLP in the last two years.

– Feldmahler (project leader)

In response, director Michael S. Hart of Project Gutenberg offered support to keep the project online.^[19] This offer was rejected by Feldmahler, who voiced concern on having the project hosted in the United States, and consulted the Canadian wing of Project Gutenberg.^[18]

On 2 November 2007, Michael Geist wrote an article discussing the specifics and the wider implications of this case.^[20]

• Mutopia project: focused on typeset scores.
• Choral Public Domain Library: focused on choral and vocal music.
• Werner Icking Music Archive: contains mainly early music.

• List of online music databases

• IMSLP Official Homepage
• IMSLP forums