Install a2jmidid by entering the following commands in the terminal:
sudo apt update sudo apt install a2jmidid
Daemon for exposing legacy ALSA MIDI in JACK MIDI systems
Main goal of this project is to ease usage of legacy, not JACK-ified apps, in a JACK MIDI enabled system. a2jmidid is a daemon that implements automatic bridging. For every ALSA sequencer port you get one JACK MIDI port. If ALSA sequencer port is both one input and one output, you get two JACK MIDI ports, one input and one output.