musescore/MuseScore

MuseScore is a free, open source music notation and composition software that provides WYSIWYG editing on a virtual notepaper with high-quality TrueType font rendering.

The tool addresses the need for accessible music notation software by combining fast note entry with comprehensive editing capabilities. It uses a visual design where musicians work directly on a virtual staff, with support for multiple input methods including MIDI input for note entry. The software includes an integrated sequencer and synthesizer for playback, and handles a range of music file formats including MusicXML, MIDI, MEI, and MuseData for both import and export operations.

MuseScore suits musicians, composers, and educators who need to create, edit, and share sheet music without licensing costs. It works well for anyone from casual users to those producing publication-ready scores, since it supports printing and PDF generation. The project is appropriate for contributors interested in music software development, as it welcomes forks and pull requests through its public repository.

The codebase is written in C++ and uses Qt for its interface, with a modular architecture that includes a separate muse_framework submodule. The project maintains organized build infrastructure with CMake-based compilation supporting release, debug, and testing configurations. Code quality is enforced through pre-commit hooks using uncrustify for formatting. Development documentation is centralized in the project wiki, covering compilation setup, code structure, unit testing procedures, and Git workflow guidelines.