Music is generally defined as the art of arranging sound to create some combination of form, harmony, melody, rhythm or otherwise expressive content. Exact definitions of music vary considerably around the world, though it is an aspect of all human societies, a cultural universal.
It is often debated as to what extent the origins of music will ever be understood, and there are many competing theories that aim to explain it. Many scholars highlight a relationship between the origin of music and the origin of language, and there is disagreement surrounding whether music developed before, after, or simultaneously with language.
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