The band's first album, "Ozomatli", was released on June 16, 1998 on Almo Sounds. At the time, in addition to the band's six constant members, namely vocalist/trumpet player Asdru Sierra, vocalist/guitarist Raul Pacheco, sax and clarinet player Ulises Bella, bassist Wil-Dog Abers and percussionists Justin 'El Niño' Porée and Jiro Yamaguchi, Ozomatli also featured MC Chali 2na, turntablist Cut Chemist, drummer William Marrufo, and saxophone player Jose Espinoza. The album featured the band's trademark mix of several types of Latin music: tropical genres like merengue and cumbia, Mexican styles like norteño, along with Jamaican music like ska and reggae, mixed with a heavy dose of American hip-hop and funk, often with a few genres mixed together in the same song. The band sang its socially-conscious (but sometimes humorous) lyrics mostly in Spanish, while Chali 2na's rapped in English.