GSequencer is intended to be use for music composition. It features
notation, automation and wave form editor. Supporting LADSPA, DSSI
and LV2 plugins.
Enable snaps on Debian and install nongnu-gsequencer
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Enable snapd
On Debian 9 (Stretch) and newer, snap can be installed directly from the command line: