What's old is new again this Record Store Day — and we're not talking about reissues!
Back before the development of 33 1/3-rpm vinyl records (those things that DJ types and a few of us here at Sound+Vision collect) and CDs, people used to listen to music using something called the 78, a 10-inch disc format that spun at 78 revolutions per minute and was made from a variety of materials during its lifespan, including rubber, shellac, and, ultimately, vin
