Anyone can help with a question in use of Boulder 866....

I have just got a Boulder 866 in my hands, a really nice equipment.

I have tested and learned on it about almost all of its different functions.

Now I have a question ...

Have anyone ever made the sound of YouTube from your personal computer with USB output connected to the USB input of 866 ?

I understand signals from PC are basically low-end sound signals but l just have the interest in knowing.

I think the basic question should be Whether 866 can be connected in this type.

I have done but NO SOUND. It appeared at that time seemingly the personal computer and 866 didn't know each other.

Anyone can help?

Thank you!