I bought a new home with 2 built in speakers in living room, 2 in master and 2 out by pool. Everything runs to a central location which I was told would need a receiver. I know nothing about receivers So I’m lost on what to buy. I’d like to be able to play music in each location independently. Example, music outside but not playing in liv room or master. Do I need 3 2 channel receivers? Any help appreciated!