All original release soundtrack versions, as appropriate for each movie.
Dolby 6 Track (as Dolby Digital 4.1, or 5.1 as appropriate),
Dolby Stereo (as Dolby 2.0 surround)---This is being included,
Mono (as Dolby Digital 1.0)
(These were all different in some details, such as the voice for Aunt Beru being supplied by a different actress. I think these may have had differences in The Empire Strikes Back as well.)
Release on Blu-ray.
