Sonos Arc DTS

[the prescotts]

Gladiator in UHD on Blu Ray dropped through the letterbox yesterday and I was excited to hear how that would sound through the Sonos system (Arc, 2 x ERA 300's as surrounds & Sub) So disappointed to learn that the Arc is not compatible with DTS/DTS X so only plays in stereo. Any Blu Rays in Dolby Atmos sound fantastic but has anyone found a reasonably priced work around to play Blu Rays that are DTS audio format as surround sound?

[Chilly for June]

I have a gen 1 beam which recently has a software update which I'm sure enabled DTS so I would be surprised if the newer arc couldn't be updated to support it.