My language was a little off, my bad.
I guess the answer to my Q is 'NO'. Although 2Pac oversaw the production on many of his tracks, his contribution was purely lyrical. ie pac was just a performance poet working with a beat.
It just got to thinking when he sings #'got the police bustin' at me, but they can't do nothing to a G'# - that song is in the key of G, I thought it might have been some kind of lyrical ambiguity in reference to the actual musical-theory side of the song. Coincidence maybe?