Once your Audio Groups are created, you can always go in to each group and remove devices and delete groups. This is particularly useful to know since Alexa devices cannot exist in multiple groups.
To modify or delete a group in the Alexa app go to Settings – Multi-room Music/Audio Groups.
Then tap or click on one of the created groups to display.
Finally, on the specific group page you can select to add, deselect to remove, or use the Delete This Group button.
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