When Music (MIDI) is enabled (QSynth on Linux), all SFX get muted, any idea?

[AquariusPower]

so, I end up playing just with SFX...
I saw nothing special at logs.

To have MIDI music, I have to run QSynth.

I tried maximizing notebook volume and IVAN's SFX volume (it is independent on new branch), but nothing can be heard.

Does someone has any clue? I mean, could it be an OS problem? I checked alsamixer and saw no problem. On ubuntu it uses pulse-audio.
I can try to track it also, checking if something weird happens on the SFX initialization or sound playing.

PS.: ubuntu here

[AquariusPower]

it was an OS problem.

change at QSynth/Setting/Audio/AudioDriver to PulseAudio

and it is working now!