Staffing schedules led to the band having a surplus of engineers at one point, and as a result, they split recording between Elsinore and the Edge's home studio to increase productivity. Engineer Robbie Adams said the approach raised morale and activity levels: "There was always something different to listen to, always something exciting happening." To record all of the band's material and test different arrangements, the engineers utilised a technique they called "fatting", which allowed them to achieve more than 48 tracks of audio by using a 24-track analogue recording, a DAT machine, and a synchroniser. The focus on capturing the band's material and encouraging the best performances meant that little attention was paid to combating audio spill. In issue 14 of U2's fan magazine "Propaganda", Lanois said that he believed some of the in-progress songs would become worldwide hits, despite lyrics and vocal takes being unfinished.