I have an old Logitech Z-5500, a Pioneer KRP-500M (monitor only, has no speakers but has internal amplifier and has connections for external speakers), and a Roku Ultra. The Pioneer is connected with the cable box via HDMI 5, and the Roku is connected to the TV with HDMI 6 (there are only 2 HDMI ports on the TV). The Logitech is connected to the cable box via an optical output. The TV cable audio is fine. However, the Roku has only the audio from the TV cable and none of its own. I called Roku customer service and they could not find a solution for me. Hope you can help. Thanks.