I'm playing on PC! I can see the voiced name being said, but it isn't spoken aloud. The only thing I can think of is that I originally started a file with Jamie and then got the voice DLC right before step 2. I did exit out of the game while doing this, but maybe because I already had a save file it doesn't update? I heard him say Jamie in step one but ever since I haven't heard him say the name (I picked Skye if it matters). I'm currently on step 3. Once I finish and start a new save I'll see if that fixes it.
Just so I make sure I did it right though, I just need to copy and paste voice_name_dlc.rpy and voice_name_dlc.rpyc, not go into the voice folder and manually copy/paste all of the names?