Comment by simonask

Perfect pitch is quite debated. What we know is that: 1) Most people with perfect pitch have it mostly on their main instrument, and they translate the pitch in their inner ear if they hear a different instrument, and 2) Many with perfect pitch report that it gets less reliable with age.

There seems to be many different ways of having perfect pitch. For example, some singers may connect it more to the physical sensation of applying tension to their vocal cords (so they have to be singing the pitch or imagine singing it to be able to tell). For others it's purely auditive.