Much of the percussion was recorded in a disused candy factory located in Madison; Butch Vig, Marker and sound engineer Billy Bush set up a drum kit within the factory and recorded various fills, utilising the acoustics of the dilapidated building. Forced to stop after local police officers responded to complaints about the noise, some of the percussion was later incorporated into "Temptation Waits" (and also found its way into "I Think I'm Paranoid" and "Hammering in My Head"). The guitars would typically be run through either a filter or a wah wah pedal, and then gated off a sixteenth-note pulse to create a keyboard-like effect. Instead of using synth bass, Garbage had Daniel Shulman perform electric bass on "Temptation", mixed in with sub-bass. The band had wanted to use a theremin to create the whistle-like melodic line on the outro, and had hired one for use at the studio. The band couldn't perform the instrument well, and so utilized a sound created by an analog modeling synthesizer instead.