Hi.
Rosegarden is included in Funtoo's repositary.
emerge --search rosegarden
[ Results for search key : rosegarden ]
Searching...
* media-sound/rosegarden
Latest version available: 17.12.1
Latest version installed: [ Not Installed ]
Size of files: 6,536 KiB
Homepage: https://www.rosegardenmusic.com/
Description: MIDI and audio sequencer and notation editor
License: GPL-2
[ Applications found : 1 ]
If you are looking for this package just run
emerge rosegarden -vp