I think when you look at it, music is very difficult to strictly define. Sure you have common elements such as rhythm, melody, harmony, pitch, tone ect. But there have always been artists who have gone outside of that to challenge the entire concept of music. John Cage's 4'33 for example, a musical piece made to challenge music and written to instruct musicians to not play their instruments and instead focuses on environmental and incidental sounds. I think music is generally organized sound and the sound can be organized in any way, whether intentionally or unintentionally.