Closing out the Breakaway Music Festival on Saturday night, Bassnectar set the atmosphere in the cool, dark night outside Mapfre Stadium on fire. His performance was like a sonic boom accompanied by unpredictable electric sparks and blinding flashes of light emanating from the stage.

It was a spectacular end to two days of a psychedelic adult playground that celebrated the liberating power of music. The first day tilted toward hip-hop and Saturday emphasized electronic dance music.

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There was nothing uncontrolled about Bassnectar — aka Lorin Ashton’s — performance, other than the response from the sea of mad ravers spread out in front of him in a huge parking lot space longer than the interior of the soccer field inside by at least a half. (The event was held outside the stadium, in the big promenade at the entrance and on the newly paved lot alongside.)

Over three decades Bassnectar has refined his skills as a DJ and producer to become a master craftsman of sound. Last night, he offset complementing tones and textures like a fine painter, he flowed from rhythm to rhythm in an organic fashion, and he marvelously balanced the dynamics within each song.

Most importantly, he employed a sense of drama that was never cheap and mercenary but always potent. It was witnessed in the crowd, which erupted in ecstatic fits.

Also on the main stage, DJ and producer TroyBoi was nearly as impressive, albeit with a no-holds-barred creativity that surprisingly worked. TroyBoi reached wide for sources. He sampled diverse styles and exotic world music in an organic mix that rarely lost the music’s train of thought. The more he chopped up the samples and sounds, it seemed, the deeper the beat. When he stripped it to the bone, it continued to carry the fever.

On the smaller, Corona Electric Beach Stage early-on, Carter Cruise delivered a high energy set that didn’t surprise but cut to the core with a menacing groove. Manic at the controls, she created a satisfying show.

From that stage, with its limited crowd space, Wax Motif performed a mix heavy on classic disco.

The main stage carried the more varied program, with the rapper Lil Mosey mid-day and pop singer Christian French before. The contrast couldn’t have been greater. French is a singer and songwriter whose undistinguished pop songs—performed by his three-piece band—sometimes sounded like Twenty-One Pilots light.

Though Mosey’s rap enlivened the crowd a bit, his habit of leaving the auto-tune on during between-song comments was annoying.

Breakaway embraced personal diversity even more successfully than its musical schedule. The audience ranged wide but rarely reflected anything like mainstream. Fashion followed the event’s Bachanalian spirit, featuring a lot of bare behinds and fishnet stockings, a rainbow of hair colors, and facial decorations ranging from sparkles and fantasy headgear to terrorist bandanas. The audience ranged from the freakiest fringe to frat-ish boys out for a little craziness and high school kids looking for their first wild party.

The phrase, “While Rome burned … ” came to mind more than once.