Hello, I am developing a virtual audio driver using DDK sample MSVAD \ ac3. I have a query regarding this. Using the sample driver(MSVAD \ ac3), I am receiving PCM data while playing an mp3 song through "CopyTo" function of IDMA interface.. While playing an ac3 file also, I am getting the same result. Do the same interface gives both pcm and ac3 data? Anybody could help me by an answer? Thanks in advance Vargheese