Question: how to connect vizio soundbar to roku tv with optical cable?
Answer: Connect the end of the HDMI cable that is not attached to your Roku player, or connect your Streaming Stick to an available HDMI input on your TV. Connect an optical cable to the optical (or S/PDIF) output on your TV. Connect the opposite end to the optical (or S/PDIF) input on your AVR or soundbar.