As asked... Which DTS-X titles have Dialog Control enabled in the metadata?

Only can be found on the demo disk. I think Marc explained why you're likely to never see this "feature" enabled.

Have a copy of that along the way, but I recall there is one title where it is enabled.

I'll have read Marc's comments. This would be a great feature for many.

Don't know if there are any whole features with adjustable dialogue control (can't imagine studios would allow that), but there are a couple of tracks on the 2016 DTS demo disc. 'All I Want Is to Be Your Girl' by Holly Miranda (you can increase her vocals, just her vocals, by up to 6dB). Also, the DTS:X channel check, where a female voice calls out all 11 speakers (you can increase the dialogue level of her voice). If you don't have the DTS demo disc, then you can still get the DTS:X channel check in the extras section of 'The Last Witch Hunter' Blu-ray.

Got it. Thanks for the informative response.

It actually isn't adjustable on the 11.1ch channel check. It was another DTS:X demo (generic DTS:X demo) on the disk that had an announcer and that clip had the adjustable dialog.

This was the clip with adjustable dialog.

Mind linking to Marc's explanation?