Lmfao. THERE ARE NO CHORDS WITH 9 NOTES IN, THEY WOULD SOUND HIDEOUS.
And lol 'only great musicians like Mozart and Beethoven'. Was Beethoven so absolute that he could also hear these '9 note chords' when he became deaf?
Relative pitch isn't about singing- it means that if someone played a C on the piano, and told the person with relative pitch it was a C, if they played another note on the piano the person with relative pitch would be able to recognize what pitch it was, based on the reference note of C.