Source 1 combines a great sounding master FM broadcast recording of about half of the concert with camera audio from a low-generation Betamax video copy of the audience recording to fill in the gaps.
Source 3 is a good sounding audience recording sourced from the low-gen Betamax camera audio.
Source 4 is a slightly remastered version of fredheadset's master FM radio broadcast recording with the prominent ground/mains hum cleaned up.
Source 5 is the original file set of fredheadset's FM radio broadcast recording, unaltered.