These are audio tapes he used to do those interviews. He would often use the same tape multiple times, overwriting with each new interview, but he obviously didn't know I'd be coming down the line decades later.
In the 56 interview tapes we recovered, digitized, and put up, we have extensive interviews with stars both here and gone, television and movies, stars at the end of their careers and stars just starting out, speculating on what comes next.
All are of spectacularly terrible quality.