In twentieth century modern society, one of the most common pastimes has been listening to music. Over the last few decades the medium in which people listened to music has changed from the radio to cassettes, CDs, and Ipods. Over time the way in which music is produced has also changed. Introductions to the electric guitar in the nineteen fifties and sixties created a whole new exploration of music influencing popular genres such as rock music. In the nineteen seventies and eighties synthesizers and sequencers revolutionized music of the time. These tools allowed artist to create and produce artificial and synthetic noises and music. This influenced a variety of musical fields like pop music and eventually led to the modern popular music of