I’ll let others more knowledgeable confirm, but I don’t think high ceilings will be conducive to up-firing Atmos speakers. You might be better off sticking with 5.1 or 7.1.
Regards,
Wayne A. Pflughaupt
Unfortunately, if you have a 7.1 Atmos speaker arrangement, you purchased the wrong receiver. You need a 7.1.2 receiver. Atmos speakers need to be connected to the appropriate Atmos-channel speaker outputs on the receiver. If you connect them to any other channels, the Atmos speakers will be...