You can connect most PCs to a projector in just a few simple steps using an external VGA or HDMI cable.

We will share how you can connect Windows 11/10 Laptop to TV, Projector or second monitor via HDMI. ou will need to choose a correct cable depending on your TV, and Laptop streaming capacity.

I have spliter but my PC recognize that Sony PJ *04 projector is connected to PC so it's only give 2.0 support. I don't know can i and how to force Windows 10 to send 5.1 sound because of it.

However since your projector has HDMI and not DVI, you will need to purchase a cable that has DVI on one end (for the computer) and HDMI on the other (for the projector).