var player = new System.Media.SoundPlayer("C:\\Users\\Username\\Music\\loading.wav");
player.Play();
// Do stuff
// ....
player.Stop();
BFS.Speech.TextToSpeech(result);
I'm using Wii U System Music - Loading Source Software, it works nice
PS: It would be nice if you could do a BFS.Audio.PlayAsync() and BFS.Audio.Stop(), so it doesn't lock the script while playing the music.