"I got the idea for the song 'I Am the Walrus,' which developed very subconsciously as I kept hearing police sirens in the middle of the night at my Weybridge home and their sound fascinated me. It was so hypnotic, you know, dee doo dee doo dee dooo fading in and getting loud and then fading away again. In the studio we began with electric piano and Ringo's drums. Paul put down his bass line separately and then all the session musicians came in to put their parts on and we did a lot of mixing and such. And finally the voices were added."