Help with sending DTS or Doby Digital to old set v20x onkyo


Novice Member
I'm waiting for a proper setup for watching movies in the new house. In the meanwhile, I pick up this old set
v20x from Japan

I connected to the tv using optical
Play movies from mi box and my laptop (HDMI to TV --> optical to the receiver).

I tried several files and methods but i have a few issues. I download a free test track from the internet:

the 2nd one does not work - it has atmos - is it why it does not work? the doby digital light is not on.
the 1st and third one work well - sound quite decent.
the last two also not working.

1. Some movies work - DD5.1 seems to work. But most others cant work. Netflix seems to work fine in doby digital (i saw the light on). I have to say it sounds quite good for a tiny set :p

2. Some movies sound very wrong or quiet..

I tried both KMP, VLC, and Kodi in my laptop but had no luck.

Is it me who doesn't know how to use software to send right signal to the old receiver?

I got the doby light on in some movie but cant get the dts on.?

could you help please?

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