I only heard about it recently, and did not think I ever experienced it/was capable of experiencing it. I was reading the /r/asmr reddit the other day, and saw a reference to "the goosebumps you get from really good music", and then got an ASMR-like response. Not sure if it was a true reaction, and I was listening to music that wouldn't fit with the usual description of ASMR triggers. I'm pretty suggestible I think, so it may have been the effect of remembering "really good music goosebumps" and then overreacting to that.