Deftones is an American alternative metal band from Sacramento, California, U.S. Formed in 1988, the band was founded by Chino Moreno (lead vocals, rhythm guitar), Stephen Carpenter (lead guitar), Abe Cunningham (drums) and Dominic Garcia (bass). During the group's first five years, the band's lineup changed several times, but stabilized in 1993 when Cunningham rejoined the group after his departure in 1990; by this time, Chi Cheng was the band's bassist. The lineup remained stable for fifteen years, with the exception of keyboardist and turntablist Frank Delgado being added in 1999. The band is known as one of the most experimental groups to have come from the alternative metal music scene.

The band's debut album, Adrenaline, was recorded at Bad Animals Studio in Seattle, Washington and released on October 3, 1995. It was produced by Deftones and Terry Date, who would go on to produce the band's next three albums. While they were initially unsuccessful, the band built a dedicated fan base through extensive touring, word-of-mouth and Internet promotion. Through their efforts, Adrenaline went on to sell over 220,000 copies. It is regarded as an important part of the 1990s nu metal movement. An early track which predated Adrenaline but did not make the album's final cut was "Teething"; the band contributed the song to the soundtrack for the 1996 film The Crow: City of Angels. The band can also be seen performing the song live during one of the film's scenes.  The album spent 21 weeks on the Billboard Heatseekers chart, reaching a peak position of 23. When asked what he attributed the album's success to, Cheng responded, "One word: perseverance. We've been together for almost eight years, on the road for two, and we do it with honesty and integrity--and the kids can tell". The album was certified gold by the RIAA on July 7, 1999, and was certified platinum on September 23, 2008.  Regarding the recording of the album, Cunningham said, "At the time we did the first record--which I really like and think is good--you can tell the band was really young. We'd been playing most of those songs for quite a while, and we were just so happy to be making a record that we didn't really think a whole lot about making the songs better". Moreno felt that Adrenaline was recorded "really fast" and performed all his vocals live with the band in the room using a hand-held Shure SM58 microphone. AllMusic's review of Adrenaline praised the album's musical control, precision, overall groove and Cunningham's "surprisingly sophisticated drumming". It was also noted that "there is a bit of sameness in Chino Moreno's whispered vocal melodies, which drags the record down a bit". Answer this question using a quote from the following article:

What is adrenaline about?
The band's debut album, Adrenaline, was recorded at Bad Animals Studio in Seattle, Washington and released on October 3, 1995.