Swapping left and right channels in a stereo pair
Tap the “Rooms” tab.
Tap the Pencil icon to enter Edit mode.
Tap a Stereo Pair (a room which contains two matching HEOS speakers) to edit the group.
Tap on the Swap L&R switch to swap the left and right channels of the two speakers.
Tap the Back arrow to return to the list of Rooms.
Tap the Check Mark icon to exit Edit mode.