Os 2 where's the deezer and other music stream connection

[BpSilver]

I doubt Devialet will ever re-introduce music streaming services in their app. This was probably one of their biggest mistake in Spark to try to do everything, and pretty much everybody complained about it.
Their strategy is now to focus on what they do: delivering sound to ears. To do so, they will rather develop compatibility with all the major streaming protocols (AirPlay, Bluetooth, Spotify Connect, Google Cast?) and leave the content side of things to content providers, in their respective apps.

If u say it like that, it does make sense.. so I’ll let it go.. 
of topic question; what is the best way to stream the audio? 
Bluetooth or airplay doesn’t feel stable enough, maybe it’s just my lack of knowledge 
u noticed volume decrease? Volume 35 isn’t the same before and after update..