OOIOO and Lightning Bolt are both bands whose music is wholly unique and whose creators" influence would be impossible to overstate. YoshimiO, OOIOO"s founder and bandleader, has been a guiding force in uncompromising art across the continuum of rock and improvised music for four decades, from her work in UFO or Die to The Boredoms to SAICOBAB and beyond. OOIOO serves as a core outlet for melding freeform experimentalism with hypnotic rock pulses, defying boundaries with her acrobatic voice, electronics, trumpet and gamelan. Lightning Bolt"s Brian Chippendale and Brian Gibson have remained unparalleled in their ability to transmute frenetic whirls of percussion, gargantuan fuzz and dizzying melody into monolithic vistas. THE HORIZON SPIRALS / THE HORIZON VIRAL is a split that captures the parallels in ethos between these two ensembles, their sense of gleeful abandon and freight train momentum, in inspiring detail.