Streaming Hi-res music to devices


Hi guys,

I have a question regarding wireless music streaming. When using the VOX player either on a mac or an iPhone, depending on our setup, we can choose the Audio Output from a list of devices - devices connected via USB, the headphone jack cable, Airplay devices, and as I can see from this article - we can stream to Sonos devices, and they are listed separately.

Does that mean that the VOX player is using another protocol to stream to Sonos devices? (supposedly streaming music with higher quality compared to Airplay?) In that sense, can we call Sonus products “VOX ready”?
If so, are there any other products that we can stream music to in a similar way, from other manufacturers?
I would appreciate it if you could shed some light on that.


Kind Regards,