INTERESTING - Question.
My father could not carry a pitch....none of family could....his oldest sister took instruction from a teacher that "promised" results....four lessons later the fee was refunded.
Luckily my musical ability came from the other side of the family....one with a RICH musical inheritance....something my siblings also missed.
But, back to the topic:
While working on a "difficult task" my father would either smoke a "Camel Unfiltered" or whistle "It Came Upon A Midnight Clear" and this tune always seemed "in-key" because of its "off-key" nuance.
Sincerely,
Gargoyle