A conspicuous indicator of this is total music sales: since 2000, sales of recorded music have dropped off substantially while live music has increased in importance. The music industry has been undergoing drastic changes since the advent of widespread digital distribution of music. Creative Artists Agency is a large a management and booking company. Live Nation is a former subsidiary of Clear Channel Communications, which is the largest owner of radio stations in the United States. The largest portion of the live music market is controlled by Live Nation, the largest promoter and music venue owner. Along with their numerous subsidiaries, a large majority of this market for recorded music is controlled by three major corporate labels: the French-owned Universal Music Group, the Japanese-owned Sony Music Entertainment, and the US-owned Warner Music Group. The current music industry emerged around the middle of the 20th century, when records had supplanted sheet music as the largest player in the music business: in the commercial world, people began speaking of "the recording industry" as a loose synonym of "the music industry". Among the many individuals and organizations that operate within the industry are: the musicians who compose and perform the music the companies and professionals who create and sell recorded music (e.g., music publishers, producers, recording studios, engineers, record labels, retail and online music stores, performance rights organizations) those that present live music performances (booking agents, promoters, music venues, road crew) professionals who assist musicians with their music careers (talent managers, business managers, entertainment lawyers) those who broadcast music (satellite, internet and broadcast radio) journalists educators musical instrument manufacturers as well as many others. The music industry or music business consists of the companies and individuals that make money by creating and selling music.