THX是一種認證標準, 和DD或DTS沒有關係
Today THX works with studios and DVD manufacturers, applying
the production standards THX engineers developed to ensure
excellence in DVD mastering. THX engineers work onsite when the
master is produced to check sound levels and to provide guidance
during the sound mixing and transfer processes. All THX Certified
DVD titles are guaranteed to meet strict performance criteria and
to be compatible with all video and audio playback systems.

如果考慮一般的DVD title
我應該會選DTS更甚於DD+THX

不過迪士尼的怪電和獅子王都有人提出不如一區DD+THX
規格參考用, 還是實際比較過才知效果如何