Have you heard of a very risqué blues number from the late 1930s by Blue Lu Barker called "Don't You Make Me High" that Maria Muldaur covered on her self-titled LP in 1973? How about Ramblin' Jack Elliott's 1961 studio version of "San Francisco Bay Blues" that has since been covered by the likes of Eric Clapton? Those are just two of the hundreds of songs from the past that I've recently digitized from audio tape.