Undertow is Tool's first full-length album, released in 1993. When this album was released, grunge music was at its most popular, and pop punk was slowly beginning to become popular. Undertow helped heavy metal music continue as a leading mainstream musical style, and allowed several later bands to break through to the mainstream.Allmusic saw the album's success in the "striking, haunting visuals that complemented the album's nihilistic yet wistful mood." It was eventually certified double platinum by the RIAA on May 14, 2001.
The album was recorded between October and December 1992 at Grand Master Studios, Hollywood, California, and includes songs that the band decided to not release on their previous EP, Opiate.
"Disgustipated" is track 69 on most pressings in North America (causing most CD players upon reaching the end of track 9 to advance through tracks 10-68, which contain no data, at a rate of about 2 per second until track 69 is reached). It also appears as track 39, track 10 (mostly in Europe) or as a hidden track following "Flood" on track 9. On certain Japanese imports, "Disgustipated" is track 70, with a short live version of "Flood" as track 71. The exact breakdown of "Disgustipated" is as follows:
↑ 1.01.1Rob Theakston (July 2, 2001). "Undertow Review". AllMusic.com. Retrieved 2007-05-22. Just as grunge was reaching its boiling point and radio-friendly punk-pop loomed on the horizon, Tool released Undertow, which firmly reinforced metal's prominence as a musical style [...] With its technical brilliance, musical complexities, and aggressive overtones, Undertow not only paved the way for several bands to break through to the mainstream [...], it also proved that metal could be simultaneously intelligent, emotional, and brutal.