When I play back a DTS-ready DVD disc, it can produce sound at a Dolby digital 5.1ch level only. Why is that so?
Why can't my computer play back a DTS-ready DVD disc?
Your VAIO computer does not support DTS. Therefore, you should try not to play back a DVD disc in DTS sound.
If you want to playback a DTS-ready DVD disc with a VAIO computer, select the Dolby Digital sound or the Linear PCM sound from the main menu of [DVD Player].
DTS is only available with the combination of Dolby Digital and DTS, or of Linear PCM and DTS. A title with only DTS will never be released.