When I was younger late teens until into my thirties when I was very tired I could hear music in the air, but never locate where it came from. There sounds of instruments sounded distant and muffled but I could pick out different instruments, at the time I had no fillings in my teeth. I tried to block out the music but could not, only time made it fade until now I'm in my fifties and have not heard it in years. I tried to play the music with my guitar for years but never could capture it. I understand many musicians can hear the music. So, would that be a form of hallucination?