Not at all the case with sounds though, I can play back some of the music tracks I listened a lot to, flawed of course but still recognizable. My brain even starts doing it on its own at night, not letting me fall asleep.
Imagination is weird.
A friend of mine spent about a month very focused on the aphantasia discourse, polling everyone he knew about little details. It forced me to consider it a bit as well, but I never quite landed on an understanding of how much a person's exposure/experience is a factor, versus what is (assumed to be) innate or genetic.
Where it was most interesting was when he asked whether I could imagine music or a song. In that area, I seemed to have a more realistic imaginary experience than any of the friends he had surveyed. I am classically trained in music (and ultimately am not very skilled), so I wonder to what degree I would have this level of clarity with recalling sounds, or even imagining new sounds or songs, if I had not been trained for years in music.
If I had the first clue how to record them, perhaps I'd have a career as a composer, LOL. The actual invention of them would be no work whatsoever, though the writing it down would be, and I'm sure there'd be a good deal of editing and arranging afterwards to fix them up (plus, who's to say if they'd be any good, or wouldn't all sound kinda the same, to a trained ear?)
I'm only barely familiar with the body of "classical" music, and even less familiar with big-band or brass band music, is the oddest part, but those couple narrow sorts of instrumental music are all I get without having to put effort into it (and I mean none, it just "plays" when I'm in the right head-space and surroundings, and no I don't mean "on drugs", and actually it can be really fucking annoying if I'm trying to sleep). I wouldn't be surprised if I actually lost that ability (such as it is) if I tried to train up enough to write the tunes down.
... maybe I should look into humming-to-MIDI software, hahaha.
I can keep a visualization as long as it keeps moving or rotating. As soon as I try to visualize it as still, it disappears.