Autograf samples Tupac’s ‘Changes’ in farewell tribute to President Obama Autograf have sampled 2Pac's 'Changes' in a poignant tribute to President Obama following his farewell speech on Tuesday, January 10. Related Posts: Autograf release debut album, most personal work to date, ‘The Ace of You’ Autograf continue ‘The Ace Of You’ rollout with ‘Undivided’