On a much smaller scale, this has already been done. Tupac's posthumous "Loyal to the Game" album produced by Eminem had a number of lyrical phrases constructed out of phonemes.

There was a small amount of outrage at the time of its release, but it mostly focused on the fact that those constructed lyrics were endorsing other rappers (mostly Eminem's protégés also performing on the track), whom some fans felt Tupac would not have endorsed had he been alive.