Scores of scores

This article reports on 'OpenScore', an initiative for encoding and sharing sheet music, and its first substantial sub-project, the 'Scores of Scores' Lieder Encoding Project in association with the social enterprise 'Four Score and More'. The project incorporated a wide range of approaches---including the re-licensing of existing encodings, automated file format conversion, and crowdsourcing encodings to new specifications---which may be taken as a summary of the state of play in this rapidly changing field. This paper sets out our experiences and focuses on the issues which may be of most interest and use to others considering similar projects, particularly those managing submissions from diverse sources.