Music is the arrangement of sound to create some combination of form, harmony, melody, rhythm, or otherwise expressive content.[1][2][3] Music is generally agreed to be a cultural universal that is present in all human societies.[4] Definitions of music vary widely in substance and approach.[5] While scholars agree that music is defined by a small number of specific elements, there is no consensus as to what these necessary elements are.[6] Music is often characterized as a highly versatile medium for expressing human creativity.[7] Diverse activities are involved in the creation of music, and are often divided into categories of composition, improvisation, and performance.[8] Music may be performed using a wide variety of musical instruments, including the human voice. It can also be comp