I found an antique acetate in a shop in Brooklyn about a month ago. I finally got around to converting the audio to a digital format, and after some manipulation to get it to the proper speed (my turntable doesn't support 78RPM) and to remove a little of the noise I was surprised to uncover a love letter! Given the likely time period this technology was used was pre-50's, and the acetate was marked "Ft. Dix Gen Hospital", I'd like to imagine these are the words of a solider returned home from WWII, recovering in the hospital, missing his love.