Amazon's Alexa has a new musical talent, the company announced Tuesday. "Today, we're making Alexa even smarter with an all-new feature that lets you play music synchronized on multiple Echo devices to provide room-filling music throughout your home," said Amazon Alexa Vice President Toni Reid. Setting up the syncing is easy. Using the Alexa app, you give a group of devices a name -- "first floor," for instance. Then you can play music through all the devices simultaneously by saying something like "Alexa, play Allman Brothers first floor."