Dan over on FaceBook posted a music video from a time back when I could hear so much better (it may have been from around 1975). He had no idea there was a "once upon a time", meaning he did not know that I've not always been deaf. I shared my personal experience when it comes to music from decades ago.
It's amazing how the brain works because I can still "hear" in my mind what many things sound like. While I don't hear much of what's playing on the radio or tv now, my brain kicks in and fills in the gaps. Although there may be a few nuances of the sounds forgotten, a lot of it is there. Rhythm and vibrations help me recognize a musical pattern from an old song and and I can follow along. It's amazing how the mind can hear music from memory.