Briefing Room Music
 

I would like to start placing my own music in the briefing room and wherever else I can.
I see that there are options to do so in the briefing area and different subriefing sections. So far I have been unable to listen to wave files that I attach, formatted as with the good old IL2.
Two questions
One: what format should the sounds be?
Two: should I stop trying for now, since the option has not been enabled yet? :)