The following outline is provided as an overview of and topical guide to music:
Music is the arrangement of sound to create some combination of form , harmony , melody , rhythm , or otherwise expressive content . Music is generally agreed to be a cultural universal that is present in all human societies. Definitions of music vary widely in substance and approach. 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. Music is often characterized as a highly versatile medium for expressing human creativity . Diverse activities are involved in the creation of music, and are often divided into categories of composition , improvisation , and performance . Music may be performed using a wide variety of musical instruments , including the human voice . It can also be composed, sequenced, or otherwise produced to be indirectly played mechanically or electronically, such as via a music box , barrel organ , or digital audio workstation software on a computer.
Cultural and regional genres of music
 
  
 Musical instrument (List of musical instruments)
See also the List of musical instruments by Hornbostel–Sachs number
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