I thought about using Tidal for the Hi res stuff, but there hardly is any on there, and what is, is not what I am looking for. Sticking with Spotify, which has almost any commercial recording that I can think of at anytime. To answer the OP's question, sounds like the friend should be looking for a DAC, or a dedicated streamer then maybe into a DAC. Another way to go about this is to buy or use a cheap laptop, locally to the stereo that can be connected via USB, play it though that, and use the phone for song selection. That is how I am set up right now.