I wonder how Phonograph recorders work.
I have never used one, because they are before my time. But they work by storing sound on a round disk. A needle spins around and plays the music off the spiraled grooves. 
Interesting,  the are now antiques I guess or are they still produced?
They are antiques now, but a few bands still produce their music on them. Now they are called vinyl records. 
Yes i know many people collect those and they value the difference in sound that they get.
Yeah, vinyls are kind of a niche now. I know a few audiophiles who swear they can hear an improvement on sound when they used them over CDs and MP3s. 
I bet there is some nostalgia too for those who used them in their youth.
The phonograph disc record was the primary medium used for music reproduction throughout the 20th century. It had co-existed with the phonograph cylinder from the late 1880s and had effectively superseded it by around 1912. Vinyl records retained the largest market share even when new formats such as the compact cassette were mass-marketed. By the 1980s, digital media, in the form of the compact disc, had gained a larger market share, and the vinyl record left the mainstream in 1991. Since the 1990s, vinyl records continue to
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