Import and Export (2)

save online: *.mscz  (or self-host *.mscx)
MuseData: *.md  (legacy)
MusicXML: *.musicxml *.mxl
Sibelius, Finale, (limited) Dorico
MIDI: *.mid *.midi *.kar
Synthesia, TiMidity, …
(time for a MIDI import demo)