Synchronisation license is granted by the holder of a song to a licensee,
allowing the licensee to synchronize ("sync") music with various visual media outputs,
such as film, TV shows, advertisements, video games, websites, slide shows, trailers, etc.
Therefore, sync fees are paid for the license holders for the use of music in
various visual media productions. If a song is used in those media productions,
the producer needs to obtain two licenses: a sync license (from the publisher or songwriter)
and a master usage license (from the owner of the master recording). Sync also applies
to the digital world, for example, when someone creates a YouTube or Vimeo video that uses
copyrighted music in the background, they need to obtain a license (this process might be automated).