M65Q6-J09What is the model number of your Vizio?
It does have an optical input. I don’t know how to access that optical inputYour best option is to use an optical cable from the optical output on the TV to an optical input on the receiver. I can't find specific info on the receiver, but it's a DD 5.1 model, so it should have at least one optical input.
To add visual context to where you need to go...
VIZIO:
View attachment 191425
PIONEER:
View attachment 191426
Now one problem with TOSEC is it may not produce 5.1 depending on how you receive OTA television. Good luck.
I couldn't find a user manual for your particular receiver model, but here is one for a similar vintage model that may be applicable. Page 40 discusses how to switch inputs on the receiver.Yes. I see all this. How do I set the receiver to receive the digital input.