It’s wasting time to listen to music when you go outside because there are so many interesting noises. For example, every time it rains, I open the window and put the recorder outside. I should always be ready to be surprised, like by the siren of a patrol car in Barcelona and other cities. I hit things, on the street or anywhere, to check the sound—until I find the perfect idea of sound. I haven’t found it yet and am always searching.