Why is Tp the symbol for "tonic relative"? And what is the difference between parallel and relative minor?To learn about the basics of relative and parallel keys, you might want to read my article Relative Minor and Parallel Minor EXPLAINED first. Below I want to point out the peculiarity of Tp (or "Tonikaparallele") symbolizing "relative minor". If you have never heard of Tp or functional harmony before, you might want to read up on it here (article not yet published).