I have mild visual aphantasia in that I by default do not picture an image for something like the ball test, but instead have something between a concept and a wireframe or flat boxy rendering of it. When pressed for details I can fill those in and form a reasonably vivid mental image, but it is not by any means the default.

However, I have almost hyperphantasia for audio. I can hear near perfect recreations of the sound of something in my head, especially if it's music. This turned out to be extremely handy for voice modification training, as I could hear the target sound exactly in my head and then work to match it.