It ultimately depends on the condition of the Needle now, most of us don’t have a microscope, and yes, some vinyl people have microscopes for this purpose, so we can’t see the condition of our Needle correctly without a microscope. So we have to go based on our hearing. When the music is very sharp and much bright, so it is a sign of a good Needle. When sound is muddy and wrong, it is a sign of a bad Needle.