 I keep wanting to make music where you're not sure of the edges, where the edges fade into sounds that could be in the real world. Composer Brian Eno. So the edges of the music become softer, and there's more of a blending with all this stuff we're hearing now on your microphone, I'm sure. Echoes, where music and ambience meet, from PRI. Monday through Thursday at 10pm, here on listener-supported 90.5 FM.