Pretty much most of my life I thought everyone had this (as well as vivid imagination) but now I dont think its as common. Like I can cue up any song in my head and it plays through, all the instruments relatively separated etc. A similar thing happens for writing music, I can write song after song and rarely feel like I “dont have any ideas”.
Sometimes I wish that power could actually be utilized…
I have a perpetual mixtape running in my head. It’s literally impossible to stop. I know I’m in the depths of depression when the music stops, and I’m climbing back out when it comes back.