This is the famous formal debate between Dr. Bahnsen and atheist Dr. Gordon Stein held at the University of California (Irvine) in 1985. 

I think you would find this a very interesting audio:

Part 1 of the Bahnsen - Stein Debate 

Part 2 of the Bahnsen - Stein Debate

Part 3 of the Bahnsen - Stein Debate

Source Link      Text of the Debate

Dr. Greg L. Bahnsen believed that to deal with the academics of the day and their arguments against the Christian faith, it is necessary to do battle with them at the highest levels of scholarship using their intellectual tools against them. He could quickly analyze and give direct and compelling answers to all their objections. Prior to his untimely death in 1995, Dr. Bahnsen delivered a series of lectures on apologetics at American Vision s Life Preparation Conference. These lectures are rare in that they are some of the only video presentations of Dr. Bahnsen's teachings. The week-long sessions, presented before high school and college students, set forth the basics of the Christian worldview and the biblical approach to defending the faith.