In the mid-2000s, guitarist Enrique Jimenez was playing outside the usual circuit of rock clubs and DIY spaces in town, on stages in northwest Aurora and southwest Denver. And that exploratory spirit has benefited his current band, Altas. Formerly known as Panal S.A. de C.V., Jimenez formed the band with his brother Israel on drums and Juan Carlos Flores playing additional guitars and keyboard. They changed the name to Altas (Spanish for "heights") in 2014 in order to usher in a new chapter of the group's history. Altas's debut full-length album, Epoca de Bestias ("The Age of Beasts"), which the band will release this Saturday with a show at the hi-dive, reflects the fruition of the trio's experiments in sound, songwriting, textures and arrangements. The music is entirely instrumental, but Altas's songs have always suggested a cinematic narrative and vivid imagery.