Back when I worked in radio, we would have 33 RPM 45 sized records that were open ended interviews. They would have small holes like a regular LP.
On the cover was a list of questions to ask and how many seconds were in between each answer.
It's amazing I actually remember that shit. It was a very small part of my job.
I remember seeing one of Billy Graham that probably is worth quite a bit of money. It was like a box set of 78 RPM records, a true album, but it was Billy Graham talking on all sorts of different subjects. Death penalty, abortion, Stuff like that.