The tapes, recorded in the early 1990s by Chapman's biographer JACK JONES, trace the killer's disturbing "compulsion" to murder the IMAGINE hitmaker.
Ono's spokesman, Elliot Mintz tells the New York Daily News, "The timing of this is macabre. She thinks it's outrageous.
"We're not going to learn anything new from him. NBC granted an assassin's wish.
"It sends out a message to other disturbed people that killing is a way to fame."