I have Linux Mint 20.3 on a laptop HP EliteBook 840 G7.
I have installed Ardour 7.1.0 (rev 7.1) in Flatpak.
I am able to play midi tracks using the Reasonable Synth.
However, if I use the Fluid Synth I have no output sound...
I have tried several SoundFonts, with no result: if I hit the keyboard on the edge of the track editor (or when the head crosses notes in the editor chart) the yellow meter moves, but no stereo green meters.
I have the same routing grid than in the Reasonable case...
What could be wrong?
I would be happy to provide screenshots and any other info.
Thanks in advance!
Fabio