I noticed that they also have to be under a certain length as I tried a 1hr+ YouTube video converted to WAV and it didn't play. Yours might be too long. However, if the file fits all the criteria and the file can play, the game is set up to be able to loop it automatically.Can't tell if there's an error in my game or not, but I converted some song albums to .wav files and the in the UserData folder under Audio. All the songs I converted appear in the game, but they never start playing when Set is selected. Was there something wrong with the conversion or just a one time glitch?