I was just wondering I you ever heard of this kind of thing. Take care. -bro-bro
but here's the ironic thing: there are many many people who frolic all over the place telling people they have perfect pitch, but whenever you test them, they're not even close. my point is, if you have the skill that you have (springboarding off a strong memory of C) then not only can you get the job done, but you can probably do it better than most people who actually claim to have it. so i say you might as well just say you have it. to increase your strength, familiarize yourself with where a low C is in your vocal register, (you can usually hum it quietly, should be a casual and easy note for a male, if you are a male) and just practice trying to find that note while other songs are playing. also familiarize yourself with the key of every song you've ever heard, and always learn what key songs are in. this will help you even more. perfect pitch (absolute pitch), or the sneaky workaround you have, is not at all required to be a wonderful and great musician, BUT it will provide you with an extra edge in professional situations