It's a clever way to discover new music and potentially appreciate the cultures that helped create you. As Spin points out, though, you might want to think carefully before you send in samples. Ancestry's terms of service ask you to give up partial rights to govern how the company uses your DNA, including damages that might come as a result. It's not necessarily an egregious violation, but you might just want to swing by the generator and make an educated guess at your background instead -- you'll get the musical diversity without the costs or legal anxieties.