LAFAYETTE, LA -- While relaxing a couple of years ago, professor Joshua Caffery found himself in the mood to unwind with some old-time Cajun music. He asked Amazon's Alexa to play selections from Dewey Balfa, a celebrated fiddler and singer credited with popularizing the genre. Instead, Alexa frustratingly steered him to the catalog of modern pop artist Dua Lipa, Caffery said.