Streaming-music service Beats Music is opening up some of its programming to outsiders, with the goal of proliferating the new $120-a-year subscription player in the broader online universe. “If you’re willing to pay $100 a year for music, which in my experience for all the world’s music is a tremendous bargain, you should have access to music anywhere you might want it, in your car, house, anywhere,” Beats Music Chief Executive Ian C. Rogers told CNET in an interview. Beats Music on Friday made public its API. An API, or application programming interface, is a tool for programmers to make one piece of software talk to another piece of software. APIs make it possible for you to register for apps using your Facebook identity automatically, for example. Several other streaming-music services make APIs available publicly, like Spotify and Rdio.