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Change the Speaker Configuration to 7.1
Check AAC capable receiver
Check TrueHD capable receiver
Check DTS-HD capable receiver

You should be good..

Thanks very much,
I need to change Speaker Configuration to 7.1 although I have setup of 5.1 speakers of Tannoy TFX ?

and about my Denon 1200 , is it support LPCM ?

On the image above what I need to choose on :
Audio Output Device ? ( in the Lenovo Stick 300 have Intel HD Gpu, I have read that have WASAPI or DIRECSOUND or INTEL GPU )
Passthrough output Device ?

I need to leave the box of :"Boost volume level on downmix" checked ?

I have LG TV uf850 , The image above isn't from my screen , it is from the internet .

Thanks.

Change the Speaker Configuration to 7.1
Check AAC capable receiver
Check TrueHD capable receiver
Check DTS-HD capable receiver

You should be good, 5.1 or 7.1 doesn't make a different since Passthrough is enabled.
Leave everything the same in the PICTURE

Thanks ,
I ask what to choose for the option of " Audio Output Device" and "Passthrough output Device" because what you see on the picture hasn't my setup , I have lg tv and on the pic have Samsung , I only want to know what I should choose on this two boxes when my Lenovo Stick 300 will come .

Thanks.