Music: Online music audio and scores

Contains bibliographies, a blog, and guides to common types of music reference sources.

Choral/vocal scores, texts and translations

The Free Music Archive is an interactive library of high-quality, legal audio downloads

Includes all types of music: classical, popular, etc.

The scores and libretti in this Virtual Collection include first and early editions and manuscript copies of music from the eighteenth and early nineteenth centuries by J.S. Bach and Bach family members, Mozart, Schubert and other composers, as well as multiple versions of nineteenth century opera scores, seminal works of musical modernism, and music of the Second Viennese School.

One of the most comprehensive sources for online music scores

Founded by Bay Area resident Aaron Dunn while still a student at Skidmore College, "Musopen is an online music library of copyright free (public domain) music. We want to give the world access to music without the legal hassles so common today..." - The Beethoven Journal 24.2 (Winter 2009): 90-93.

May not have complete works

The complete New Mozart edition

This collection holds digitised images of some of the world's oldest surviving volumes of printed music. Early Music Online is the result of a pilot project in which more than 300 volumes of 16th-century music from the British Library were digitised from microfilm.

SchirmerOnDemand is an ever-expanding library of digital perusal scores. Over 1200 scores are currently online.

A search engine for online music scores

The Sheet Music Consortium is a group of libraries working toward the goal of building an open collection of digitized sheet music using the Open Archives Initiative:Protocol for Metadata Harvesting (OAI:PMH).

Selected works from the Music and Theatre Collection; extensive list

Selected music scores from Indiana University Cook Music Library