Concerning the Muddy Waters Folk Singer album:
As far as I know the first "audiophile" remaster/repress of the album was that of Mobile Fidelity, released in 1994. There is no mention of the mastering engineer on the LP's gatefold cover. I've never heard an original 1964 Chess pressing, nor the Analogue Productions issue or the 1-Step, so have no idea how they rate relative to one another. I mention the MoFi for those who happen to see a copy in the wild at a good price