A quick fix release:

• Fix issue 1247: Fix compilation without MODULES_BUILD_STATIC=1
• Fixed issue 1243: Slow startup
• Fixed missing simpledrums MESS synth

For the complete list of changes see:
https://github.com/muse-sequencer/muse/blob/4.2.1/src/ChangeLog

The homepage:
https://muse-sequencer.github.io/
Download:
https://github.com/muse-sequencer/muse/releases/download/4.2.1/muse-4.2.1.tar.gz
https://github.com/muse-sequencer/muse/releases/download/4.2.1/MusE-4.2.1-x86_64.AppImage
Demos page:
https://github.com/muse-sequencer/muse/wiki/Demos
Forum:
https://linuxmusicians.com/viewforum.php?f=61