Is this surround sound mix the same with both formats? just one is a higher bit rate isnt it? how does each differ in the actual film making process, does a director/producer/editor or who ever create the sound track then send the same one set of "uncompressed audio" or how ever i should decsribe it. then Dolby and DTS both compress them to fit on dvd? or do Dolby and DTS work together with the film makers and create the audio tracks independantly?