The development of "Subdivisions" began following the success of
Rush's
Moving Pictures (1981) album. The band began developing new material between tour dates, often using soundchecks to experiment with musical ideas. According to the guitarist
Alex Lifeson, these sessions included informal writing exercises. He also recalled that some of these early ideas were captured on cassette and later shaped into completed songs. "Subdivisions" emerged from these jam sessions, with the lead vocalist
Geddy Lee's synthesizer playing forming the song's foundation. This change in instrumentation had a structural impact on the band's dynamic. With Lee focusing on keyboards, the drummer
Neil Peart and Lifeson effectively became a dedicated
rhythm section, allowing them to "tune in to each other's parts" more directly. By late 1981, the band returned to
Le Studio in
Morin-Heights,
Quebec to work on the live album
Exit… Stage Left. It was during this time that Peart began working on the lyrics for "Subdivisions". He recalled hearing the initial musical concept outside, when Lee and Lifeson returned from the studio and played a demo for him on a portable cassette player. "Subdivisions" was nearly complete by the time Rush previewed it live during the final leg of the
Moving Pictures tour in the UK and the United States in late 1981. Bootleg recordings from those shows suggest that the guitar was more prominent in early versions. However, when the band resumed work on their next studio album
Signals in the summer of 1982, the sound of "Subdivisions" shifted significantly. Lee's synthesizers were brought to the forefront, while Lifeson's guitar was scaled back in the mix. This change in instrumentation became a point of contention during the mixing process. Lifeson recalled feeling that the guitar was too low in the mix, noting that he raised the
fader himself during the session, only for the producer
Terry Brown to lower it again. Though Lifeson maintained that the song itself was strong, he disagreed with the balance of the final mix and stated that he continued to advocate for a stronger guitar presence for years after that. == Composition ==