My house came with a control 4 system with in-ceiling speakers throughout the house. It was terrible. All the speakers are wired to one central location in our basement. I switched it out for a simpler set up with amazon echos and monoprice amps.
In the basement: I plugged the speakers for each room in to an amplifier from monoprice (~$120 each). I then added an amazon echo dot ($20) to each amplifier. Each echo is named for its respective room. In the actual rooms we have echos. We just tell the echo to play music and it plays through the built in speakers. It sounds complicated because I am probably not explaining it well, but I really like how it works and it was simple to set up.