1 Opéra Libre is not a software, though it is
2 developed and licensed like one. Opéra libre is
3 just... an opera; a music score that is meant to be
4 printed, read, played and sung.
7 To compile the source code and obtain the score as
8 a PDF, PostScript file, as a PNG image or a MIDI
9 sound file, you will have to use the LilyPond music
10 typesetting engine. It is a GNU Free software that
11 is both powerful and simple to learn, and that you
12 can download on http://www.lilypond.org. It runs on
13 most modern Operating Systems, and has been ported
14 for various architectures.
17 Having installed LilyPond, just compile the main
18 source file, either vocal_score.ly for the Vocal
19 Score, full_score.ly for the Full score or
20 livret_score.ly for the libretto (these options are
21 not fully implemented yet).