LilyPond version 2.12.3 2010 LilyPond is a music typesetter. It produces beautiful sheet music using a description file as input. LilyPond is part of the GNU Project. LilyPond uses a versioning scheme that easily identifies stable and development releases. In a version "x.y.z", an even second number 'y' denotes a stable version. For development versions 'y' is odd.