I have built my own app for windows 8 phone on unity 3d game engine. The sound format used is MPEG and WAV by default in unity. However when I put this project in to my nokia lumia 920, there is a sound problem in such a manner that the sound is continuously lagging behind the background. Please suggest me what kind of sound format does windows phone 8 support or should I have to compress the formats MPEG and WAV in unity before deploying it in to phone. If yes, then please tell also that what is the way to compress sound formats in unity. I would be a great help for me.