Over the weekend, considering copyright law, I said that in the 19th century, music authors deemed trumpets to be copyright infringing items, as they later did for pianola's and CDs. I was asked for a reference. I wrote about Jessica LItman's article "Real Copyright Reform" on my blog.
https://davelevy.info/real-copyright-reform/ or https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1474929
Image Credit in the blog.







