I use both Tidal and Amazon HD on a Node 2i connected via ethernet. Note that the optimal way for the Node 2i to access these services is using its own network bridge, which requires you to access the services using the BluOS app. If you play Tidal or Amazon from within the BluOS app then the node will do so via ethernet or wi-fi using its own internal network bridge and that gives the best quality, including full access to Tidal Masters in MQA quality. If you use the separate Tidal or Amazon HD apps and send commands to the Node 2i that way, the Node uses Airplay - it is your phone/tablet in that case that is streaming and sending the music to your Node. If you use the BluOS app, the streaming is done by the Node itself. Hope that's clear !