The Rosegarden team is proud to announce the release of version 18.06 of Rosegarden, a MIDI sequencer that features a rich understanding of music notation along with basic support for digital audio.
http://www.rosegardenmusic.com/
Along with some bug fixes and a few new features, 18.06 brings more simplification of the code and further progress toward simplifying the UI notification mechanisms that keep the UI in sync with the underlying Composition.