I have a soundbar with one HDMI in and one HDMI out (for ARC capable TV). My question is how do I connect both my cable box and my DVD player to run through the soundbar if there is only one input port? When I connect one of those devices into the soundbar it will only play audio from that source. When I select the other source on my TV (either DVD or Cable Box) it will still only play what is connected to the soundbar. Do I simply need some adapter that allows another input port on the soundbar so I can plug both DVD and Cable box in to it? The optical cable connection works fine as the other choice of course but I hear HDMI inputs allow for better sound/video capabilities? Is this a waste of time?