Help:What's it all about?
CPDL stands for 'Choral Public Domain Library', an internet-based free sheet music website which specializes in choral music.
Begun in December 1998, CPDL is one of the world's largest free sheet music sites. All its scores are in the public domain and can be freely downloaded. Most of these are public domain editions of music whose copyright has elapsed, but some scores are newly composed and offered for download by the composer or copyright owner.