The film used to produce the movie was shot in 1973 using four cameras at five live shows performed on December 8, 9 and 10 (early and late shows on the 9th and 10th).

What wasn't known at the time was due to a malfunction the audio and video were recorded out of sync.

As John Albanian discusses in the liner notes, the problem was such that not until today's technology could the issue be painstakingly resolved.

In 1974 Roxy & Elsewhere released some of the tracks from these shows and a few others.

Then the 2014 Roxy by Proxy release made available more tracks exclusively from the December dates and all different from any on the previous release.