I don't have a DTS CD's to test with, but I would first make sure that the CD input is set to auto-detect. (There are some specific instructions on page 31 of the manual, but the basic idea here is that you need to hold down one of the format buttons -- I just did this using "STEREO" -- for five seconds, and when the second line of the display changes to "MODE: DTS" use the left and right navigation buttons to scroll through to "MODE: AUTO"). That *may* solve your problem. If not, let us know.

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