After listening to the Frankfurt recording, I've noticed that on some songs (Closer To You, Sister Blue,...) you can hear a voice that sounds similar to Suzy O'List/ Gill O'Donovan. However, they were only on the 1988 tour with the former appearing at the Marquee 1992 gigs. Did they decide to give someone a pitch shifter for the main tour(excluding Geneva)? It's not Spike's vocoder I'm hearing