I have it from early age, and it also shifts now that I'm almost 40. I think the more constantly I use it though, the more it seems to settle back into accuracy.
replyThank you! That's really interesting. So it's like a muscle I guess. More you use it = better.
replyThat's not true for everyone. Some extraordinary musicians with perfect pitch also reported that it starts drifting for them as they age (I remember Oscar Peterson and Jacob Collier telling this)
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