Following long periods of inactivity my brain all at once regurgitated this idea:
Maybe the way for a streaming station that has no music license to legally play some music on rare occassion might be this...
During a time while no listeners are connected to the server, which for my station is most of the time, one could slip in some music and watch the server activity window very closely.
Upon the first sign of a listener connecting, one would switch away from the music and play talk material which requires no license.
It would be like a form of safe sex.