The Disco Biscuits are an American jam band from Philadelphia. The band consists of Marc "Brownie" Brownstein (bass guitar, vocals), Jon "The Barber" Gutwillig (guitar, vocals), Aron Magner (keyboards, synths, vocals), and Marlon B. Lewis (drums). The band incorporates elements from a variety of musical genres with a base of electronic and rock. Their style has been described as trance fusion.

The Disco Biscuits formed in 1995 at the University of Pennsylvania. Brownstein, Gutwillig, Magner, and the original drummer, Sam "Sammy" Altman, bonded over a shared affinity for psychedelic rock, electronic music, soul, blues, jazz and classical music. This eclectic mix of interests helped inspire their style of live electronic music, which is sometimes called 'trance fusion'. The term references the band's choice to incorporate elements of trance music - specifically the driving, rhythmically repetitive drum beats and melodic sections that repeat and evolve over time - into the instrumentation and conventions of a live jamband where guitar, bass, keyboards, and drums play structured songs with sections for exploratory improvisation.

The band honed their style while playing at bars and fraternity-house shows in the Philadelphia area in the mid-1990s. Bassist Marc Brownstein credits the improvisational ingenuity demonstrated by the jamband Phish during the 95-97 tours as a particular inspiration for the Disco Biscuits' sound.

The first inklings of what ultimately became trance-fusion emerged during shows played by the band shortly after keyboardist Aron Magner incorporated a Roland JP-8000 into his live setup in late 1997. This analog-modeling synthesizer supplied sounds that lent a distinctly electronic flavor to jams that were in most other ways typical Phish-inspired blues-rock improvisations.^{[citation needed]}

In 2005 drummer Sammy Altman left the band to pursue a career in medicine. The band began a search for their next drummer ending with a two-night, sold-out drum-off concert at the Borgata's Music Box in Atlantic City. In December 2005 Allen Aucoin was announced as the new member of the band. Aucoin knew members of the Biscuits' road crew and had opened for the Biscuits with his previous band, Skydog Gypsy, in the past. In 2006 the band purchased the Old City Philadelphia studio space that had previously belonged to DJ Jazzy Jeff. The space became a place for local musicians to congregate and work, culminating in the collaborations recorded in recording studio efforts known as the Planet Anthem sessions. Around the time Planet Anthem was released, the Biscuits also collaborated with hip-hop producer Damon Dash working on a variety of projects.

The band has created live, improvised scores to films on occasions throughout their career, including Akira in 1999, Tron in 2015, The Fifth Element in 2023, and 2001 A Space Odyssey in 2024.

In October 2025, drummer Allen Aucoin departed The Disco Biscuits after more than twenty years with the band. In a statement released jointly by Jon Gutwillig, Marc Brownstein, and Aron Magner, the group said that the decision "came after many years of reflection, conversations, and attempts to work through challenges," emphasizing that it was "not financially driven" but related to "communication, creative direction, and the ability to connect on and off stage". The statement also noted the band's appreciation for Aucoin's contributions over more than a thousand shows and announced that Marlon B. Lewis would join as drummer for the remainder of the year, with all tour dates moving forward as planned.

Aucoin released his own statement confirming his departure, writing, "After 20 incredible years with The Disco Biscuits, the band is moving forward without me." He added that while there were "multiple reasons for this decision by the band," it was "not solely financially driven". Aucoin thanked fans, crew, and bandmates for two decades of touring and recording, saying he remained "deeply grateful".