Ray Charles Live In Viareggio (1976)

In earlier posts I've described how some of Ray Charles' concerts (in 1979 and in 1984) in Viareggio were covered by Italian TV (and possibly also radio). This article in the newspaper Unita implies that an earlier performance, on 3 August 1976, was also televized by Rai Uno - on 16 September of that same year. I assume that this program has not survived.

Who knows more?