Music is all around us. For most people, music is an everyday part of life; for some people who have headphones stuck in their ears 24-7 music is an all day everyday part of life. People listen to music in almost any environment imaginable - school, work, church, in the car, at clubs or dances, or even simply listening to it in the shower at home. Different kinds of people listen to different kinds of music at different times in the day or in their lives. Personally, I know that I have entertained myself with everything from rap to rock to reggae. My preferences are everchanging. A question I have, however, is why is music so influencial? I know from personal experience that I often listen to different genres of music based on my mood or my environment, and that different types of music can alter my mood.