Talk:Audiograph Player/@comment-29466044-20161009021620/@comment-16533050-20161009054257

Are audiograph sheets actually paper, or wood? I always took them to be so, but they could be metal or another substance.

If they are metal, very complicated and intricate music boxes have been created with less technology.

Also, antique phonographs used both metal and wax cylinders (like the old brown Edison cylinders) for recordings.

Finally, we shouldn't forget the old player pianos fitted with an apparatus enabling it to be played automatically by means of a rotating perforated roll. :)