I have a projector setup in the basement of the house I just bought. It is a sweet setup, but I am having a hard time figuring out the way to setup a Chromecast with sound from a surround system. The projector has an hdmi input, and the Chromecast will stream through that input. However, I cannot figure out a way to get my Vizio surround system to link to the projector. This is what the projector looks like for inputs:
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