Gasp refers to more than one artist: 1) Gasp was a power violence/sludge band from southern California, active from 1996 to 1999.
Gasp are known for using elements of grindcore, psych, ambient noise, tape manipulations and down-tuned sludge/doom in their music, which resulted in them being called the only "Psychedelic Power Violence" band of all time. Ever the since the band's demise, ex-members have played in various projects, ranging from acid techno to doom metal.

Read more about Gasp on Last.fm.