It is a fact that some people hear pitch better than others, but from what you are saying, none of this has any bearing on your 'phenomena'.
Yes but it is also a fact that we ALL hear pitch or frequencies more accurately than just about anything else (in the midrange of course)
We are sensitive to amplitude with a threshold of about 10%.
We are sensitive to pitch (frequency) at a threshold of about 0.2%.
Fortunately most equipment (other than a TT or analog tape) is always way way more accurate than 0.2% in frequency.
It has occured to me, however, that doppler effects coud be a real problem for those who like to listen to music on a high speed unicycle, which probably explains why NO clowns can be audiophiles even if audiophiles can sometimes be clowns...like me ;-)

