Once Human is an American heavy metal band from Los Angeles, California, founded in 2014 by music producer and former Machine Head/Soulfly guitarist Logan Mader. On September 4, 2015, the band released their debut album The Life I Remember through earMUSIC.

Fear Factory is an American heavy metal band formed in Los Angeles in 1989. Throughout the band's career, they have released ten full-length albums and have evolved through a succession of sounds, all in their main style of industrial metal. Over the years, Fear Factory has seen frequent changes in its lineup, with lead vocalist Burton C. Bell being the only consistent member for 31 years until his departure in 2020. Guitarist Dino Cazares is the only original member still in the band. The band went on hold in March 2002 following some internal disputes, but resumed activity a year later without founding member Cazares. Previous bassist Christian Olde Wolbers replaced him as the new guitarist, and bassist Byron Stroud joined the band. In April 2009, a new lineup was announced. Cazares returned as guitarist, and Gene Hoglan as drummer. Bell and Stroud reprised their respective roles, and this lineup recorded the band's seventh studio album titled Mechanize (2010). Former members Wolbers and Raymond Herrera — together comprising 50% of the band's legal ownership — disputed the legitimacy of the new lineup, and a legal battle from both parties had begun. Despite this, Fear Factory has since released three more albums: The Industrialist (2012), Genexus (2015) and Aggression Continuum (2021).