Has everyone seen this TV blooper? It's a device by Edison.
In any event, early sound recording or playback devices are just an amplification of grooves. A needle passing over grooves to create a sound, which is amplified.
It would probably be impossible to credit the original discovery to any single person. Jmo... The patents being something different, as to my understanding a sound device made of wax might be an entirely different invention from one made from vinyl.
Or an obscure method in a foreign country might evade proper patenting and/or promotion in another country.
These guys have "Talking Tape" which I think is pretty interesting and exactly along the same lines as early sound device recording. https://www.inventables.com/technologies/talking-tape
Edison ripped of European inventors wholesale.
Nikola Tesla was just like Edison, in fact if you look at this list patents, they are equally unremarkable in regards to discovery, or invention, but perhaps more along the lines of innovation on existing techniques and technologies.