Sleeping People is an
instrumental rock band from
San Diego, California that formed in early 2002. They first started playing live at the end of that year as a trio consisting of Joileah Concepcion (guitar), Kasey Boekholt (guitar) and Brandon Relf (drums), with bassist Kenseth Thibideau joining the group in 2003. In 2005, the band released their self-titled debut album through
Temporary Residence records. Around that same time, guitarist Joileah left the band due to relocation, and her friend
Amber Coffman replaced her on guitar. With Amber they wrote and recorded 3 tracks that appeared on their second album,
Growing. In early 2007, Joileah returned to her former position, and the original lineup resumed. The style of
instrumental rock they play is sometimes referred to as
math rock, which is characterized by complex, atypical
rhythmic structures, stop/start
dynamics and angular,
dissonant riffs.