hi we are only getting dolby atmos on bt sport ultimate live but it is intermittent on the correct program/ league. it will only be on for two mintues then transfers down to 5.1 or 2.0 from 7.1. anyone know how to resolve this when using correct wiring and an sonos arc soundbar. we are getting dolby digital plus?
7.1 TrueHD is Dolby Atmos uncompressed. you need your TV to support HDMI eARC to the eARC connection on the Sonos Arc. this provides upto 37mbps throughput, whereas HDMI-ARC only supports 1mbps. HDMI-ARC will support Atmos, but only in compressed 5.1 format afaik.
make sure also you have an Ultra fast HDMI lead between the Arc and TV.