An Audiograph Player is an apparatus used to play audiographs.
Audiograph players are self-powered, simply involving the push of a button to be turned on and off. They can both play and record audiographs and are mostly seen in the possession of Dunwall's more economically secure citizens. To play an audiograph, the sheet is placed into the top of the machine, and when the player is activated, the paper is pulled through the slot.
There is no mention of how audiograph machines work, but audiographs have holes punched into them and when put into the player, they are converted into sound. When recording, the machine punches holes into the sheet as the recorder speaks.
In Dunwall, audiograph machines are used to record journals, music, miscellaneous thoughts, and even books. Various people record audiographs, leaving them in their players, and Corvo is easily able to listen to them.
Places where audiograph players can be found include: The Hound Pits Pub, Dunwall Tower, The Golden Cat, the Offices of Dr. Galvani, the Dunwall Whiskey Distillery, the Assassins' headquarters, and the Office of the High Overseer. People who record audiographs include: Farley Havelock, Treavor Pendleton, Callista Curnow, Emily Kaldwin, Piero Joplin, Hiram Burrows, Thaddeus Campbell, Jessamine Kaldwin, Anton Sokolov, Daud, and Samuel Beechworth.