Violinist's album honors the underground effort to keep jazz alive after Stalin's ban

https://www.npr.org/2023/02/13/ [login to see] /violinists-album-honors-the-underground-effort-to-keep-jazz-alive-after-stalins
Before the days of digital photography, X-rays were developed onto a thick plastic-like material. Doctors would view them by clipping them to tables that projected light through the back of image, revealing ghostly images from inside the body.

But during the Cold War, X-rays were used to illuminate something else.

From 1946 to his death in 1953, Joseph Stalin banned jazz and many other forms of western music in the former Soviet Union. But bootleggers found a clever way around the ban. They sold copies of records on the black market that were etched into the surface of old X-rays.