Google's AI Invents Sounds Humans Have Never Heard Before

Jesse Engel is playing an instrument that's somewhere between a clavichord and a Hammond organ--18th century classical crossed with 20th century rhythm and blues. Then he drags a marker across his laptop screen. Suddenly, the instrument is somewhere else between a clavichord and a Hammond. Before, it was, say, 15 percent clavichord. Then he drags the marker back and forth as quickly as he can, careening though all the sounds between these two very different instruments.