Source: gmidimonitor Section: sound Priority: optional Maintainer: Debian Multimedia Maintainers Uploaders: TANIGUCHI Takaki , Jaromír Mikeš Build-Depends: debhelper-compat (= 10), libasound2-dev, libgtk-3-dev, libjack-dev, pkg-config, python3 Standards-Version: 3.9.8 Homepage: http://home.gna.org/gmidimonitor/ Vcs-Git: https://salsa.debian.org/multimedia-team/gmidimonitor.git Vcs-Browser: https://salsa.debian.org/multimedia-team/gmidimonitor Package: gmidimonitor Architecture: any Depends: ${misc:Depends}, ${shlibs:Depends} Description: GTK+ application that shows MIDI events GMIDImonitor is GTK+ application that shows MIDI events. . You need to connect desired source of MIDI events to gmidimonitor input using some kind of patchbay like qjackctl, patchage. For restoring connections (not connecting every time) you can use LASH.