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U2 wanted to build on the textures of "The Unforgettable Fire", but in contrast to that record's often out-of-focus experimentation, they sought a harder-hitting sound within the limitations of conventional song structures. The group referred to this approach as working within the "primary colours" of rock music—guitar, bass, and drums. Guitarist the Edge was more interested in the European atmospherics of "The Unforgettable Fire" and was initially reluctant to follow Bono's lead to seek a more American sound. The Edge was eventually convinced otherwise after discovering blues and country artists such as Howlin' Wolf, Robert Johnson, Hank Williams, and Lefty Frizzell on American public radio stations during the Unforgettable Fire Tour. Despite lacking a consensus on their musical direction, the group members agreed that they felt disconnected from the dominant synthpop and new wave music of the time, and they wanted to continue making music that contrasted with these genres.