Not the GP, but I can. I can play back songs in my head quite vividly or remember and replay how different people sound like, when it's coupled with a memory.
Now I'm wondering about other senses. I can readily imagine sounds and pictures, but it took my brain some time before it figured out how to imagine smells and tactile sensations when I asked it, like a muscle that is rarely exercised.
Since my imagination layers on top of my existing senses, I wonder if aphantasia is really about the (in)ability to induce sensory hallucinations at will (and to what extent). That's about the only way I can make sense of it personally, given my own subjective experience.
I can hear my thoughts and even speak to myself. I don't picture myself doing that and I don't have any image in my head.
Maybe it "looks" like a comic with only speech bubbles. It's still not the right image, because there is no image, but it also doesn't feel like a total void.
Since my imagination layers on top of my existing senses, I wonder if aphantasia is really about the (in)ability to induce sensory hallucinations at will (and to what extent). That's about the only way I can make sense of it personally, given my own subjective experience.