Install fluidr3mono-gm-soundfont by entering the following commands in the terminal:
sudo apt update sudo apt install fluidr3mono-gm-soundfont
Description:
Fluid (R3) Mono GM SoundFont from MuseScore
This is the hard disc space-saving Mono version of the complete Fluid (R3) GM SoundFont in the compressed SF3 format, as shipped with MuseScore 2.0 up to, but not including, 2.2. . It can be used with most modern MIDI synthesisers which support the SF3 format and has a low installed size footprint, while providing the large GM sound set. As it comes under the MIT licence, it can be used in most settings. . This package will be installed into /usr/share/sounds/sf3/ which is the standard Debian location for system-wide SF3 soundfonts.
Homepage: https://musescore.org/en/node/41521
Version: 2.315-4
Section: universe/sound