In a 2014 audio recording played at the Diddy trial, Casandra 'Cassie' Ventura is heard threatening to 'kill' a man over fears of a leaked sex tape.

Cassie Ventura says Diddy had blackmail material on her ... namely, videos from their "freak-offs" ... and she says he used the footage to get her to do more freak-offs.

Opening arguments in the hip-hop mogul's high-profile trial began on Monday, May 12, at a federal court in Manhattan Federal prosecutors allege that Combs is the mastermind behind a criminal enterprise that forced women — including his ex-girlfriend — to perform sex acts he filmed Casandra "Cassie" Ventura once compared Sean “Diddy” Combs to infamous abuser Ike Turner,