"[Morricone] did all the orchestrations and recorded for me 20 minutes of music I could use wherever I wished but without seeing any footage. I cut his music into the film and realized that there were places, mostly scenes of tension, in which his music would not work... I secretly ran off and recorded in a couple of days a few pieces to use. My pieces were very simple electronic pieces – it was almost tones. It was not really music at all but just background sounds, something today you might even consider as sound effects."