MuseScore 4: Your New Go-to for Digital Music Making (UPDATED)
MuseScore 4, free and open-source digital music notation and composition software, comes with an all-new interface and many new features.
MuseScore is one of the world’s leading free music composition software, featuring an easy-to-use interface and many powerful features. It allows professional and amateur musicians to compose music for various instruments.
In other words, MuseScore’s note mode allows you to produce creative and beautiful musical scores with ease, whether you’re a piano, guitar, violin, or saxophone player.
UPDATE
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MuseScore 4 Released! New Mixer, Accent Colors & Muse Sounds Plugin | UbuntuHandbook
Free and open-source music notation software MuseScore 4 is out after more than 2 year since the last major release.
MuseScore 4 now have a modern look UI with both light and dark mode, as well as 7 accent colors. It provides a setup dialog to choose between them on first launch, though user can re-configure them along with fonts, background and paper colors by going to Preferences -> Appearances.