One afternoon in the summer of 1995, a curious incident occurred. I was fine-tuning my spoken commentary on a CD I was preparing about music and the brain. To detect glitches in the recording, I was looping phrases so that I could hear them over and over. At one point, when I was alone in the room, I put one of the phrases, “sometimes behave so strangely,” on a loop, began working on something else and forgot about it. Suddenly it seemed to me that a strange woman was singing! After glancing around and finding nobody there, I realized that I was hearing my own voice repetitively producing this phrase—but now, instead of hearing speech, I perceived a melody spilling out of the loudspeaker. My speech had morphed into song by the simple process of repetition.