Do you actually have a DVD player, or are you just relating what you hear / read ?

>Dolby was declared the standard format. Audiophiles will sometimes select DVDs based on their offering a DTS soundtrack. You are just about guaranteed of have a Dolby Digital soundtrack. DTS is a possibility, but not near the guarantee level of Dolby.
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>PF
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>>>I made some comments before about consumer electronics product positioning. I used to read a mag "Widescreen review". I remember they had many engineering articles discussing the technical superiority of DTS over Dolby Digital when companies were initially looking to finalize the DVD standard. Yet Dolby was selected as the standard sound format. People go out of their way now to buy DVDs that offer a DTS soundtrack.
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>>You make it sound like an either / or proposition. Most "new" DVD's (vs re-mastered analog recordings) offer multiple encodings on the same disk: digitial stereo, digital 5.1, DTS. The is no "final" format.