My grandpa was an engineer at Detroit's WJR radio beginning in 1943. He kept what was considered ''trash'' at the time: the on-air master transcription discs of the radio shows that he liked. He also cut a lot of discs for his own use. I've inherited his collection of over 250 discs and am digitizing and podcasting them. If he were alive today, these are the things that would be on his iPod.