Weird voice and chime! Stannah Midilift at Tate Liverpool RIBA North

Tate Liverpool's main Albert Dock home with the Otis mod lifts was being done up at time of filming, therefore they had this temporary home at the RIBA North campus. Other parts of this building have nice Schindler lifts (unfortunately restricted access) but the Tate sadly just has a Stannah. It's an unusual one though with a weird voice and chime I've never heard before.