My understanding is that there is a patent holder https://en.wikipedia.org/wiki/Shazam_(application)#Patent_infringement_lawsuit https://en.wikipedia.org/wiki/S

My understanding is that there is a patent holder https://en.wikipedia.org/wiki/Shazam_(application)#Patent_infringement_lawsuit https://en.wikipedia.org/wiki/Shazam_(application)#Patent_in... in the US.