I have a house with 6 inside speakers and 4 outdoor speakers. I want to be able to use my phone to control the music being played. Can you suggest what and how to for me please.
I suggest you install LMS (Logitek Media Server) on a PC, it's really great software, and free! You then need as many players as you have outlets for the music. These can be hardware players like the Squeezebox Touch, Chromecast audio or a PC or a phone or tablet running a free client like Squeezeplay. Then, you can control all these individually or together using your phone. They just need to be on the same wifi network.