I'm a noob when it comes to digital music. I thought that .wma files were encoded in digital 5.1 surround sound. Well, I spent .99 and downloaded a .wma file and then burned it to a cd. I then played it back on my HT system and its PCM with analog dolby prologic II decoding (not what i wanted unfortunately). Now .ac3 files play fine in dolby digital. Am i missing something here or is .wma not encoded as dolby digital? If .wma is not encoded in dolby digital then is there a site where I can purchase .ac3 music? Thanks in advance.