Despite the initial difficulties with sampling, the band and production team eventually became comfortable with it, even sampling Mullen's drumming, the Edge's guitar riffs, Clayton's bass lines, and Bono's vocalisations. Howie B sampled almost anything he could in order to find interesting sounds. He created sequenced patterns of the Edge's guitar playing, which the guitarist, having never done it before, found very interesting. Howie B explained, "Sometimes I would sample, say, a guitar, but it wouldn't come back sounding like a guitar; it might sound more like a pneumatic drill, because I would take the raw sound and filter it, really destroy the guitar sound, and rebuild it into something completely different." Although sequencing was used, mostly on keyboards, guitar loops, and some percussion, it was used sparingly out of fear of becoming overreliant on it.