Google will unroll six new voices for its Google Assistant, including that of entertainer John Legend. The voices will be both male and female, and will be made more natural with a technology called Wavenet, which Google's DeepMind artificial intelligence team first announced 18 months ago. "Wavenet models underlying raw audio to create a more natural voice, its closer to how humans speak. The pitch, the pace, even all the pauses that convey meaning — you want to get all that right," Google CEO Sundar Pichai said at a tech conference on Tuesday. The first voices will be released immediately, with John Legend's voice coming later this year. Following the official announcement, Chrissy Teigen, Legend's model wife, tweeted the news. "I don't even need human John anymore," she joked.