Musical style and influences
The direction of the band is dominated by chief guitarist, lead vocalist, and principal songwriter Billy Corgan. Journalist
Greg Kot wrote, "The music [of The Smashing Pumpkins] would not be what it is without his ambition and vision, and his famously fractured relationships with his family, friends, and bandmembers." Melissa Auf der Maur commented upon news of the group's reunion, "Everyone knows Billy doesn't need too many people to make a Pumpkins record, other than Jimmy [Chamberlin]—who he has on board." Many of Corgan's lyrics for the Pumpkins are cathartic expressions of emotion, full of personal musings and strong indictments of himself and those close to him. Music critics were not often fans of Corgan's angst-filled lyrics. Jim DeRogatis wrote in a 1993
Chicago Sun-Times article that Corgan's lyrics "too often sound like sophomoric poetry", although he viewed the lyrics of later albums
Adore and
Machina as an improvement.
The Smashing Pumpkins' distinctive sound up until
Adore involved layering numerous guitar tracks onto a song during the recording process, a tactic that
Mellon Collie and the Infinite Sadness coproducer Flood called the "Pumpkin guitar overdub army". There were a few overdubbed parts on
Gish but Corgan began to really explore the possibilities of overdubbing with
Siamese Dream; Corgan has stated that "Soma" alone contains up to 40 overdubbed guitar parts. While Corgan knew many of the songs would be difficult or impossible to replicate from their recorded versions in concert (in fact, some songs were drastically altered for live performance), he has explained the use of overdubbing by posing the question "When you are faced with making a permanent recorded representation of a song, why not endow it with the grandest possible vision?" This use of multilayered sounds was inspired by Corgan's love of 1970s
arena rock bands
Queen, Boston, and
Electric Light Orchestra, as well as shoegaze, a British alternative rock style of the late 1980s and early 1990s that relied on swirling layers of guitar noise for effect.
Mellon Collie coproducer Alan Moulder was originally hired to mix
Siamese Dream because Corgan was a fan of his work producing shoegaze bands such as
My Bloody Valentine, Ride, and
Slowdive.
Like many contemporary alternative bands, The Smashing Pumpkins utilized shifts in song dynamics, going from quiet to loud and vice versa. Hüsker Dü's seminal album
Zen Arcade demonstrated to the band how they could place gentler material against more aggressive fare, and Corgan made such shifts in dynamics central to the pursuit of his grand musical ambitions. Corgan said he liked the idea of creating his own alternative universe through sound that essentially tells the listener, "Welcome to Pumpkin Land, this is what it sounds like on Planet Pumpkin." This emphasis on atmosphere carried through to
Adore (described as "arcane night music" in prerelease promotion) and the
Machina albums (concept records that tell the story of a fictional rock band).
The Pumpkins drew inspiration from a variety of other genres, some unfashionable during the 1990s among music critics. Corgan in particular was open about his appreciation of heavy metal, citing
Dimebag Darrell of
Pantera as his favorite contemporary guitarist. When one interviewer commented to Corgan and Iha that "Smashing Pumpkins is one of the groups that relegitimized heavy metal" and that they "were among the first alternative rockers to mention people like
Ozzy and
Black Sabbath with anything other than contempt", Corgan went on to rave about Black Sabbath's
Master of Reality and
Judas Priest's Unleashed in the East. The song "Zero", which reminded Iha of Judas Priest, is an example of what the band dubbed "cybermetal".
Post-punk and gothic rock bands like
Joy Division/New Order, Bauhaus, The Cure, and
Depeche Mode were formative influences on the band, which covered such artists in concert and on record.
Psychedelic rock was also referenced often in the band's early recordings; according to Corgan, "In typical Pumpkins fashion, no one at that point really liked loud guitars or psychedelic music so, of course, that's exactly what we had to do." Corgan acknowledged that a chord he jokingly claimed as "the Pumpkin chord" (a G#
octave chord at the eleventh fret of a guitar with the low E string played over it), used as the basis for "
Cherub Rock", "
Drown", and other songs, was in fact previously used by
Jimi Hendrix. Other early influences cited by Corgan include
Cream, The Stooges, and
Blue Cheer.
Regarding the band's influence upon other groups, Greg Kot wrote in 2001, "Whereas Nirvana spawned countless mini-Nirvanas, the Pumpkins remain an island unto themselves." Still, some artists and bands have mentioned the Pumpkins as an influence, such as
Nelly Furtado and members of
My Chemical Romance. My Chemical Romance vocalist
Gerard Way has said that they pattern their career upon the Pumpkins', including music videos. The members of fellow Chicago band
Kill Hannah are friends with Corgan, and lead singer
Mat Devine has compared his group to the Pumpkins.