Analysis of information sources in references of the Wikipedia article "Cover version" in English language version.
As it became clear in 1908 that Congress was going to give music publishers the right to control mechanical reproduction of their songs, the Aeolian Company was entering into arrangements with many of the largest music publishers to be the exclusive manufacturer of piano rolls of their compositions. Fearing that Aeolian might create a piano roll monopoly, Congress responded to pleas of other piano roll manufacturers to subject the mechanical right to a compulsory license.
{{cite web}}: CS1 maint: bot: original URL status unknown (link)