I've heard what I would call celestial music only three or four times in my life. One time was last week, while I was meditating. I was going through my usual routine of meditating for forty breaths on each of my chakras. When I got to my throat chakra, I heard a long series of beautiful notes above and around me. Though it was as interesting as a melody, I can't remember a melody as such. Perhaps it was more like celelstial wind chimes than celestial music. As with my previous experiences of celestial music, it made me think, "Oh, I can hear heavenly music! It's so beautiful!" without giving me any sensations I can remember.