Harry Livingstone recorded all his discussions and interviews on cassette tape.
The large majority of these tapes were recorded in the early 90’s. They are of a decent quality. But some of them are recorded accompanied by a buzzing sound whether that is because electronic equipment close by, or re-using tapes who knows.
I managed to isolate the buzz in some to get a very listenable recording. Any sudden cuts are either due to tape flips or just because that is where the tape stops.