The Talking Machine Forum — For All Antique Phonographs & Recordings

This is a very interesting You Tube video that I had never seen until today so I thought it might interest members of the forum who may have missed it. https://www.youtube.com/watch?v=-0H8Q4QD-cM

My opinion: that's not a "coronet" [sic]; sounds like a man singing falsetto.
Grammatical note: possessive neuter third-person singular pronoun, "its" (no apostrophe). "It's" is a contraction for "it is."

That was interesting. I hadn't heard that 1878 tinfoil of Edison before.

David Giovannoni, Patrick Feaster and others spent several years studying the phonautograms and wrote a short book about it. They also have a website about such work... http://www.firstsounds.org/