Vinyl, "The Shure Audio Obstacle Course", Rare, and Very Useful
This is a 1971 vinyl record that tests and hopefully confirms your turntable cartridge and stylus are doing their job. Shure was a big provider of low and high-end turntable cartridges, and wanted to ensure that users were satisfied with their products, so put out an "obstacle course" record to run the stylus, cartridge and turntable through its courses. 1971 was a long time ago, and I was an early engineering student at university, and really interested in the technical aspects of getting