When I make a Mini HD DVD using a file that already has Dolby 5.1, it strips out the DD 5.1 and down converts to MP3 audio. Maybe the 5.1 is not stripped out but the HD-DVD player does not see it. MEP Pro 12 may not support making 5.1 Dolby, but if the file used to make the Mini HD DVD already has the 5.1 why can't it use it instead of down convert to Stereo?