With an even more "European" musical aesthetic than "Achtung Baby", "Zooropa" is a further departure from the group's "rootsy" sound of the late 1980s. Much like how the group embraced technology for the Zoo TV Tour, they utilized technology as a musical resource to a greater extent on "Zooropa". The record exhibits additional influences from alternative rock, electronic dance music, and industrial music—it is more synthesised than U2's past work, featuring various sound effects, audio loops, and use of synthesisers. In addition to the Edge playing synthesiser, Brian Eno received credit for the instrument on six tracks.