Google would love to have the voices that come out of its products sound as natural as Samantha, the near-future AI who lived in Joaquin Phoenix’s earpiece in the movie Her . To achieve this effect, you could hire a dulcet-voiced actor to record all the words, phrases, and phonemes you’d ever need and write sophisticated software to recombine them on the fly . . . like a chump. Or you could automate the whole enchilada with deep learning .