I have acid pro 4.0 and the 5.1 surround pluggin, when i have a file done and render it as a ac3 file, i go back to play the file all there is, is a bunch of high pitch screaches, so i though maybe it needs to burnt to dvd before you can hear it , so i tried nero 6.0 , tmpg, nothing will reconize this file. what program burns 5.1 dvd-audio ? anybody know what im doing wrong? thanks bob