Sorry if this is basic and i am overthinking it. I have a projector with one hdmi input. i have a roku and xbox that i would like to connect to it but also have a soundbar. we have a soundbar with 4 inputs and one out and only the xbox seems to work this way. with the roku you can hear it start and get a flash of the home page then it goes blank. no source. any tips or suggetions? the roku and xbox work just fine plugged directly into the projector but we wanna use the soundbar.