I am using Roku Express (3900 series) (EU) and love the Private Listening Feature on the app as it means I can connect the Roku audio to my stereo. I have a Raspberry Pi lying around and was wondering if it would be possible to have the Private Listening on that so I didn't have to use my phone, similar to raspotify (Raspberry Pi as Spotify Connect Device). Anyone know how to do this? Is it possible? Can someone develop a repo?
Is it already a thing? Can you add this as a feature?
Would be grateful of any replies 
Eddie