Bark Psychosis were an English post-rock band from London which was formed in 1986. They were led by Graham Sutton who was the sole constant member of the project. They were one of the bands that the British music journalist Simon Reynolds cited when coining "post-rock" as a musical style in 1994, and are thus considered one of the key bands defining the genre.

In its original form, the group was a quartet of Graham Sutton, Daniel Gish, John Ling and Mark Simnett. This line-up (with contributions from other passing members) recorded early singles and EPs plus the seminal 1994 album Hex, before gradually dissolving over the course of 1994, with Sutton moving on to his drum and bass project Boymerang and to production work. Sutton reformed Bark Psychosis in 2004 without any of the other previous members, as a flexible project in which he was supported by a shifting roster of guest musicians (including Talk Talk drummer Lee Harris and experimental guitarist Colin Bradley of Dual).

Due to Sutton's renewed focus on production work, Bark Psychosis have been inactive since 2005, with no announcements of a final breakup or future plans. While active, the band did not find much success critically or commercially, remaining in obscurity for decades, with only a handful of verified live recordings in existence. However, Bark Psychosis have since cultivated a devout cult following, as well as retrospective critical acclaim.

Sound and influences

Bark Psychosis' sound has covered various musical styles including minimalism, introverted indie rock, psychedelia, post-punk, cool jazz, outright mechanical/industrial noise, and electronic dance music. However, the band's music is best characterized by a sense of acoustic space, moody atmospherics, murmured vocals, abstract but emotional lyrics, and a particularly sensitive and acclaimed mixture of electronic and acoustic instrumentation. Bark Psychosis is also noted for an extreme dynamic range, varying from quietly-whispered-and-played songs such as "I Know" or "Absent Friend" to thunderous metallic riffing ("Murder City") or deafening sheets of electric noise (the first half of the track "Hex").

Bark Psychosis' music is also notably melodic and expressive, and arguably owes something to the English pastoral rock tradition. The band is frequently embraced by progressive rock fans due to their experimental outlook, and their use of both atmospherics and extended instrumentation. Sutton himself seems uncomfortable with the association, commenting, "Sometimes people compare us to Pink Floyd, and they are just a muso thing. I'm more interested in feeling, really..."

Bark Psychosis' musical development has also been characterized by restlessness, which has contributed to the band's historical lack of stability while at the same time stimulating its creativity. In another 1994 interview, Sutton stated, "The whole thing about being in this band is never repeating yourself. I've always tried to surprise myself and other people as well, fucking around with people's preconceptions about what you're about and stuff. I really get a real huge fucking kick about giving people the wrong impression. Or twisting things around. Like, it might sound initially sweet, but it ain't. Or vice versa." In January 1988 Ling and Sutton (both aged 16) left school to pursue music full-time. They recruited drummer Mark Simnett, who had previously done community work centered on St John's Church in Stratford, London.

Using Simnett's connection with the church, Bark Psychosis arranged rehearsal space for themselves in the crypt of St John's,

Cheree singles and early live gigs (1988–1990)