“Listen to Your Body Choir,” which won this year’s A.I. Song Contest, was produced by M.O.G.I.I.7.E.D., a California-based team of musicians, scholars and A.I. experts. They instructed machines to “continue” the melody and lyrics of “Daisy Bell,” Harry Dacre’s tune from 1892 that became, in 1961, the first to be sung using computer speech synthesis. The result in “Listen to Your Body Choir” is a track that sounds both human and machine-made.