little-endian said:

Is there anyone (still) in possession of the theatrical DTS-track and willing to share it with me or tell me how I can get it? I'm aware that in rare cases, some are offered on eBay but it seems to be difficult to 1. get them and 2. convert them to the common 5.1 format since the LFE information is contained in the rear channels and lowpass-filtered and redirected to the subwoofers during playback in the cinema.

Now I see where your snide "I don't like to share" comment comes from in my Alien DC thread. Impatience will not help anyone here. Andrea is probably busy as are the rest of us. This isn't all we do during a day. Secondly, you could have sent a pm to myself or Andrea, maybe even DoomBot, to inquire about getting this audio.

I have the cinema DTS in Wav64 format that DoomBot sent back to me. It isn't as simple as you make it sound because on a DTS CD each reel is a separate file that needs to be decoded and then edited to the next reel, THEN a sync is done once all those pieces are in place.

There is also information here that discusses the DTS Whitepaper on the matter and what people have done to achieve their results.

If you would like what I have for Waterworld please pm me.