I am trying to get surround sound when using the Roku3. The Roku3 is connected to a Samsung TV using HDMI. The Samsung 1250 home theater doesn't have an HDMI input port only an optical port for sound. I saw that the Roku Ultra 4640 had an optical out port but its no longer available. I also found several HDMI to optical splitters but read that some services such as Netflix may not work when these are used. Has anyone used a splitter with a Roku box and was successful in getting 5.1 sound to work for Netflix etc.? or any other suggestions on how to make this work. thanks