@falconscastle1 Thanks for the note here. When you say you don't hear any audio, you are watching antenna TV on the TV itself?
Is your Roku Smart Soundbar connected to an HDMI ARC capable port on your TV? Have you also tried connecting it to your TV via the optical audio cable?
If you aren't hearing audio when using the TV as the playback source, it's likely that you may not have connected the Soundbar to an HDMI ARC capable port on the TV. I would recommend checking this, or connecting the Soundbar to your TV using the included optical audio cable.
@falconscastle1 How is your Soundbar connected to your TV? You should be able to use the Soundbar for audio from the TV if it is connected to an HDMI ARC capable port on your TV. Or, you can connect the Soundbar to your TV using the included optical audio cable. If you use an HDMI ARC connection, you'll also want to make sure that HDMI ARC and CEC are enabled in your TV's settings. We'd recommend checking with your TV manufacturer for help confirming if your TV supports HDMI ARC connections, and adjusting settings accordingly if so. If that isn't an option for your TV or it doesn't support HDMI ARC or CEC, you'll want to use the optical audio cable to connect your TV to your Soundbar.
This is likely a connection configuration issue that may be preventing audio from properly being sent to your Soundbar from the TV, based on how it is connected.