Google's ongoing experiments into machine learning are always fascinating, fundamentally reconfiguring the way things are programmed and implying possible sea changes in, well, pretty much any field that involves computers. Still, we are in the early days of this technology, and its impression of humanity is noticeably off. This is particularly true when it attempts art. We have marveled together over a neural network's stomach-churning attempt at writing a Christmas carol--never forget the line "I've always been there for the rest of our lives"--and now Google has released something called the A.I. Duet. As coder and musician Yotam Mann describes above, the technology has absorbed vast quantities of music to create an idea of what relationships of notes sound like together.