Indeed, but audio isn't exactly "visual", is it? And I'm not sure video, images and motion are actually 3 different things. Images are just still motion and vi

Indeed, but audio isn't exactly "visual", is it? And I'm not sure video, images and motion are actually 3 different things. Images are just still motion and videos capture motion, so it's really just "video and audio" of which one is visual, the other is not, thus my confused/surprised comment.