Here are a few old notes from Andy McKaie regarding Chess stereo...: "As far as mono versus stereo goes, it seems that if they recorded something specifically for an album in the '60s it was recorded and mixed in stereo. If recorded for a single, it's a toss-up, and for extended periods of time, they never bothered to do anything but mono mixes. The '63 sessions you refer to were recorded and assembled for an album, but only a mono assembly was done and the multi-tracks are either unmarked in our vault or missing. The running masters from those sessions are even only in mono, whereas I have found running masters from 1959 Howlin' Wolf that are in stereo. Then again, nothing but mono exists from Wolf's Red Rooster in '61, though there's a stereo master for Shake for Me from same session. The inconsistancy drives me nuts, too, but I can only issue what we have available to me to issue. Sometimes life is like that." AND "Chess used to keep a two track running for sessions, even when they were doing multi-track sessions. Sometimes the two track seemed to be in mono, sometimes stereo. Before he died, Ron Malo told me that Chess really didn't care about or understand stereo, so if an engineer or a producer didn't dwell on it, what you got was a tossup. Leonard did the Muddy sessions, except for the concept albums, and according to Ron, he really wasn't interested in stereo - his notion was that he was making a single to sell..."