Local psychedelic/indie-rock trio Doc Aquatic is no stranger to recorded music: The group’s Bandcamp page boasts three EPs — Memories, Distance Means and, most recently, three-song offering Tombs. The band (brothers JC and Zack Hayes on guitar and drums respectively, and Charles Gately on bass and synthesizers) has expanded Tombs to nine tracks for its first full-length. An early listen shows a collective that’s matured into its sound. Doc Aquatic has always had a grip on controlled chaos — on Tombs, JC’s voice dips and soars, sometimes under layers of reverb, sometimes with minimal effects. Guitars range from shimmery to grungy, while drums are a riot of energy. Songs like “Sonic,” with its glimmery chord progressions and resonant production, diminish the distance between edgy experimentalism and alt-pop acumen. Doc Aquatic holds an album release show at Emerald Lounge Friday, Oct. 4. Doors at 8:30 p.m. Shook Foil and Wyla also perform. $5. emeraldlounge.com.