[video of girl playing stringed instrument, narrator speaking:] Music in an important and enjoyable part of our lives. Music is different from noise because music is made up of regular patterns. Music has pitch, rhythm, and quality. Pitch has to do with the frequency of the vibrations. Close vibrations create high notes, and spread out vibrations create low notes. Rhythm is a regular pattern of tones. The quality of music is made up from different tones.