Maid of Sker

This achievement is missable. It it cannot be unlocked in the same playthrough as except on hard difficulty, where listening and saving are separate actions.

Phonographs (as they are called ingame) are listed below in order they are found. Most of the phonographs are in safe rooms, which are indicated with blue doors. If you see a blue door, there will be a phonograph, but not necessarily vice-versa.

I have described the recordings so that if you miss a phonograph, you can replay the recordings you have from the menu and will know which one to go back and get. The eleven phonographs found in mapped areas are marked on the map, but the other four, including the two missable ones, are unmapped.

1. In the garden shed at the beginning. The shed is unmissable, but the phonograph itself is missable. Be sure to listen to it when you go through this room. In the recording, Elisabeth interrupts Prudence dictating a memo.

2. Ground floor, east of main lobby, in a safe room. The first time you pass by it, Henry Hughes will be screaming for help from a nearby room. In the recording, a dog interrupts Elisabeth's singing practice.

3. Basement, to the right after exiting the elevator, in a safe room. Abraham interrupts and annoys Elisabeth.

4. Unmapped area, immediately after leaving the basement, on your right. A sustained musical note.

5. Unmapped area, in the crypt beneath the graveyard, in a safe room on the right. Elisabeth and Abraham talk.

6. Gardens, safe room on the left at the end of a walled path. Elisabeth confides in Prudence.

7. Gardens, safe room just beyond the phonic modulator workshop. Elisabeth cries.

8. Ground floor, safe room to the right (south) of the bar. "Thomas."

9. First floor, safe room on the south side of the room west of the train. Elisabeth confronts Prudence.

10. First floor, safe room on the south south side of the east wing. Isaac grumbles about Elisabeth.

11. Second floor, safe room adjacent to the large bedroom at the northwest corner. Elisabeth worries.

12. Second floor, safe room east of the telephone. You will be on the run from Abraham when you get to this one. Elisabeth sings.

13. Basement, in an umissable safe room in the west wing. Elisabeth has a plan.

14. Unmapped area, found by a desk lamp after you escape from Isaac. This one is easy to spot, but is nevertheless missable. Elisabeth cackles wickedly.

15. Ground floor, safe room east of the piano/Isaac room. This phonograph is mandatory/unmissable. Elisabeth despairs. If you listened to all of the phonographs, the Easy Listening achievement will unlock here. If not, you missed one.

For people who prefer videos:
(This video is not mine.)