Hello, Nohak!
I tried it with .ogg and with .wav, but I do not have a sound either in one format or the other.
Unfortunately, I have stopped any projects with GDevelop at the moment, because I want to do games mainly for mobile phones, but in this situation where there is no sound on mobile phones and I can not solve the problem.
As I said with Godot, I have no problems with the sound of the same mobile phones.
In another post I showed my debug the program with Android studio and there gives me an error in Media player.
[url]Mobile Performance - #14 by vpvelev]