Because only several types of devices can set the source by default, you need to confirm whether the type set in X1 is correct. I'm not sure whether you have added a soundbar device. If you have, please open the app, edit -- soundbar edit, click the icon to view the device type, and click the type to change to PA Return to edit -- source confirmation, and select the second item of source switching mode. Set the switch command, enter the source list of the cycle switch, and then complete it. When setting activities, you can select different options in the source list for different activities to automatically switch the source input when switching activities.