I have asked this before, but got no answers. :-( Situation as follows:
Frescobaldi 4.0.1: At „MIDI settings - Player output" can choose between „SimpleSynth“, „Fluidsynth“ and „Fluidsynth - Qsynth“. None of those give any sound. Frescobaldi 3.3.0: All options work. I did not change anything else in my system. MacBook Pro M1 MacOS 15.4.1