For the soundcard detection and handling when there is more than 1 soundcard on the system !All this went haywire because sdl2 SDL_OpenAudioDevice never returns 1 for compatibility with sdl1... !!!
And also the fact that I never had the opportunity to test on a proper system with 2 soundcards.So if you have only 1 soundcard and everything works fine, no need to update this time !