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.