An accurate and concise definition of music is fundamental to being able to discuss, categorize, and otherwise consider what we understand as being music. "Explications of the concept of music usually begin with the idea that music is organized sound. They go on to note that this characterization is too broad, since there are many examples of organized sound that are not music, such as human speech, and the sounds non-human animals and machines make" . Many authorities have suggested definitions, but defining music turns out to be more difficult than might first be imagined. As this article will demonstrate, there is ongoing controversy about how to define music.