Technically, a melody is a piece of music that involves a series of musical notes or tones that go together in a linear progression. In this sense, it is a mixture of the musical concepts of rhythm and pitch. However, most people understand a melody to be the part of music that sounds good. It is this pleasantness that makes melody important in the overall comprehension of music. It is what draws people to the sound, although it can differ wildly with various genres of music. In jazz, the melody is used as the starting point, with musicians choosing to improvise or come up with new additions that complement the melody.