Yes Richard, they are interesting articles. I hadn't realised that it's 80 years since tape recording was patented. I do recall  (vaguely) when tape recorders became well-known in Australia; it must have been in the late 1940s or early 1950s. Around that time, two avid Crosby fans took a recorder into the enclosed  crying-room at the rear of their local cinema to record the sound track of Bing's movie PENNIES FROM HEAVEN. The manager evicted them as they were not accompanying a child. They soon returned with a baby of one fan and achieved their objective. They hadn't told the baby's mother and when they got back home they were confronted by the police who'd been told that the baby had been kidnapped. The fans were red-faced.