Clayton's bass guitar was heavily processed, to the point that it sounded like a keyboard bass (an instrument utilized on "Mofo"). The Edge wanted to steer away from the image he had since the 1980s as having an echo-heavy guitar sound. As a result, he was enthusiastic about experimenting with his guitar's sound, hence the distorted guitar sounds on the album, achieved with a variety of effects pedals, synthesisers and knob twiddling. Bono was very determined to avoid the vocal style present on previous (especially 1980s) albums, characterized by pathos, rich timbre, a sometimes theatrical quality and his use of falsetto singing: instead he opted for a rougher, more nervous and less timbre-laden style. The production team made his voice sound more intimate, as up-front and raw as possible. As Flood explained, "You get his emotional involvement with the songs through the lyrics and the way he reacts to the music—without him having to go to 11 all the time... We only used extreme effects on his voice during the recording, for him to get himself into a different place, and then, gradually, we pulled most effects out."