If it is not explicitly told in following recipe, setting up services are described for Ubuntu 20.04 server, but applications are described for Xubuntu 20.04 workstation. If you use different Ubuntu version or Linux distribution, settings as well as content, names and places of configuration files may be different!
Got it.

Rosegarden

Rosegarden is a music composition and editing environment for Linux based systems. Here is described, how to set it up and use with Qsynth as a backend driver.

Install QSynth:
sudo apt-get install fluidsynth
Install a soundfont library:
sudo apt-get install fluid-soundfont-gs
Open QSynth:
1. Enable MIDI Input. Click on Setup..., select Enable MIDI Input
2. Configure it to use ALSA Audio Driver. Click on Setup... button, Audio tab and select Audio Driver: alsa
3. Set up soundfont. Click on Setup..., select Soundfonts tab and point to /usr/share/sounds/sf2/FluidR3_GM.sf2 or other soundfont location
4. Allow QSynth to restart when it prompts and leave it running
install Rosegarden:
sudo apt-get install rosegarden
If necessary, run QSynth.
Run Rosegarden.
1. Tell Rosegarden to play through QSynth: select Studio > Manage MIDI Devices and set the General MIDI Device to whatever QSynth broadcasts as its MIDI input option, e.g. 129:0 Synth input port...* or similar.

Rosegarden

Quick Links