alt Hacker NewsThe article is only about the absence of mental images, but the same is true for all other senses as well. People might be able to recall or imagine images, sounds, smells, tastes, feels while being awake or not. And it can be in all permutations, tho, vision affected seems to be quite common.
the only internal sense I have is my own voice. I cant even "imagine" music but rather hum it in my own voice at best. Same with others' voices