Spotify has put a robot DJ into its app — a computerized song-spinner with a “stunningly realistic” voice that queues up music based on your musical tastes and listening history. The beta version of ...

At first, “Simplicity’s Delight” sounds like a catchy pop song for a Velveeta commercial. The singer exalts “a humble slab of cheese” over a light guitar and breezy percussion. Listen closely and you ...