As one YouTube user observes, Unknown Mortal Orchestra’s video for 2015 single “Multi-Love” reflects “how the world looks through your third eye.” To let fans dive deeper into the mind-bending visuals, director Lionel Williams designed an app to accompany the video. It allows users to construct, paint and stretch virtual 3-D objects across space and time and is “meant to represent the vacuum of space by impressing upon inter-dimensional unfolding, immaterial objects and time-driven reverberation of events,” he says. Like Williams, Unknown Mortal Orchestra frontman Ruban Nielson is existentially inclined, though his music is much easier to follow — particularly the make-you-move, funky-pop moments that punctuate darker tracks. Lower Dens opens at The Orange Peel on Saturday, Feb. 14, at 9 p.m. $15/$18. theorangepeel.net. Photo by Neil Krug