Copyright
Copyright is when an artists, musician or could be any person, has a legal device that gives them the right to publish and sell their work as their own. Copyright in audio is when an artist or a composer of an original track has the legality to sell their track or song. This is important in the audio industry so people can’t claim music that isn't theirs as their own work without giving any credit to the original artists. However this does not apply for all songs as some artists do give everyone the chance to tale their work. Also any pieces or tracks made by someone who passed away over 70 years ago does lose its copyright, therefore pieces by Beethoven or Bach that are used as samples in many songs as well as used in many movies and shows are not copyright as they are free to be used.
However covers of songs are different as they are given permission by either the record company or the original artist to do the cover. A known example is how Michael Jackson in 1985 out bid Sir Paul McCartney for The Beatles catalogue. Micheal Jackson had all rights to the music of The Beatles.
Copyright benefits the music an audio industry as it influences and increases creativity and originality which is very important and admired in the industry. Due to copyright being a thing people are focusing on creating their own sound and their own style which helps expands the industry.
Bouvier, J. (1856). Copyright. Retrieved October 18, 2017, from https://legal-dictionary.thefreedictionary.com/copyright
Copyright Free Music - About Licensing. (n.d.). Retrieved October 18, 2017, from https://www.audionetwork.com/content/music-glossary/music-copyright
K. (2015, August 14). That Time Michael Jackson Outbid Paul McCartney for the Beatles Catalog. Retrieved October 18, 2017, from http://ultimateclassicrock.com/paul-mccartney-michael-jackson-beatles-catalog/