Karl is also a master emcee and has worked in Jamaica, New York, Connecticut, Boston, Philadelphia, and Japan with major Ska, Rock Steady and Reggae super stars like The Skatalites, Bob Andy, Delroy Wilson, Marcia Griffiths, Rita Marley, Judy Mowatt, Derrick Harriott, Freddie McGregor, Hopeton Lewis, The Heptones, Desmond Dekker And The Aces, The Mighty Diamonds, Burning Spear, Black Uhuru, Chalice, Third World, Steel Pulse, Toots And The Maytals, Beenie Man, Ninjaman, Mikey Jarrett, Mutabaruka, Linton Kwesi Johnson, Chakademus And Pliers, Dennis Brown, Bob Marley, Peter Tosh, Bunny Wailer, and Beres Hammond, just to name a few.