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Now Playing: 11-5-2012 Marketplace Tech Report

Brian Eno, one of the most influential musicians of the last forty years, thinks music can be too one way: Usually, artists create it and your job is to listen to it, over and over. So Eno has released an iPad app called Scape, full of the building blocks of his music that the listener assembles into their own custom compositions. It's part of something he's been calling "generative music."