The early-to-mid 1990s would see the birth of several bands in the San Diego, California music scene, some of which would lead a post-hardcore movement associated with the independent label Gravity Records. This movement would eventually become known as the "San Diego sound". Gravity was founded in 1991 by Matt Anderson, member of the band Heroin, as a means to release the music of his band and of other related San Diego groups, which also included Antioch Arrow and Clikatat Ikatowi. The label's earlier releases are known for the definition of "a new sound in hardcore rooted in tradition but boasting a chaotic sound that showcased a new approach" to the genre. Heroin were known for being innovators of early 1990s hardcore and for making dynamic landscapes "out of one minute blasts of noisy vitriol". These bands were influenced by acts like Fugazi and The Nation of Ulysses, while also helping propagate an offshoot of hardcore that "grafted spastic intensity to willfully experimental dissonance and dynamics". This movement has been associated to the development of the subgenre of screamo, while it also should be noticed that this term has been, as with the case of emo, the subject of controversy. The label also featured releases by non-San Diego bands that included Mohinder (from Cupertino, California), Angel Hair and its subsequent related project The VSS (from Boulder, Colorado), groups that have also been associated with this sound. The VSS was known for their use of synthesizers "vying with post-hardcore's rabid atonality".