You can try out Neon2 on our demo page. You can begin by selecting a link to a musical document that has undergone OMR, and then continue to insert, delete, or pitch shift notes on the page.
Source code is available on the Neon2 Github.
Installation and instructions are available on the Neon2 Wiki page.
Any contributions are welcome! The easiest way to submit code is:
Neon2 is developed by:
Neon2 is an ongoing project at the Distributed Digital Music Archives and Libraries Lab (DDMAL), at the Schulich School of Music of McGill University. Neon2 is part of the larger Single Interface for Music Score Searching and Analysis (SIMSSA) project that is generously funded by the Social Sciences and Humanities Research Council of Canada. We're also grateful for the support provided by the Centre for Interdisciplinary Research in Music Media and Technology (CIRMMT).