I haven't heard it yet, so I don't know. My understand is it's an "audience tape". Ben was looking for a semi-pro tape from the board. Don DeMichael, then editor of DB, always regretted they didn't roll tape.
My most vivid memory of that set was George Wein trying to get the band to stop - they played beyond the alloted time.
The photo of Shepp on the cover of the Delmark New York Contemporary Five lp was taken by Bill Abernathy at that performance.