DTS 5.1 /7.1 recognized like DTS 2.1

Hello. Excuse me for bad english.
Well, I connect my WD-TV WDBPUF0000NBK-EESN via s/pdf (optical) by Sony str db 895d ,but the reciver recgnize DTS 5.1 and 7.1 like DTS 2.1 , maybe i have mistake with audio settings.Please help me to extract 5.1/7.1 sound.
And another problem when I play DTS audoi file in ‘‘wav’’ format I have no sound,if I set audio on "stereo’’ then I have sound but only stereo.

Hi, welcome to the community.

Did you change the audio output to “Digital Pass Through via Optical Only” ? You can also click on “Manual setup” and select the one or more of the options that you receiver is capable of supporting.

Resolved prblem ,when update with last firware . Now everything is Ok. Thanks for care.

Hi, thats nice to hear, please remember to mark the post that assisted you as a solution, that way another user that might be having the same issue will see the answer.