 The sound on this album has led to accusations of the band lip syncing, as did the earlier video from which this CD was taken.However it has come to light that the sound used on the television broadcast of the "Out of the Blue Concert" in 1978 was a poorly mixed effort in mono sound that used a lot of the backing tapes that were used admittedly by the band due to sound problems caused by the huge metal and fibreglass stage set.The tapes were for the band's ears only, to help them keep time and should not have been heard by the audience.