Mt Eden steps up to Coachella
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Dubstep is a style of electronic dance music - Mt Eden's version is drum and bass - and the duo say they take inspiration from Kiwi drum and bass artists such as Concord Dawn and Shapeshifter.
Despite their growing fame, Cooper and Rayner, who live in Mt Eden as you might expect, have a laidback outlook on their whirling careers.
Even faced with the idea of a 100,000-strong audience at each Coachella performance - which runs in the California Desert over two weekends in April - the pair seem unfazed.
"Once I play my first two tracks and get into things, I'm on fire," says Cooper. "The adrenalin rush kicks in. We want to smash sets up, make the people happy and give them their money's worth."
Both attended Auckland Normal Intermediate then Auckland Grammar - and have been friends since the age of 11. Rayner is the son of keyboardist and music producer Eddie Rayner, of Split Enz fame, but you wouldn't know it from his music collection.
"All my vinyl collection is hop-hop," he says. "Dr Dre, Jay-Z, Nas, all of it."
Cooper was mixing music at age 11. But it's not about remixing so much these days - Cooper described Mt Eden's music to the NZ Herald as "trancey and ... something with a riff, a nice melody, that's vocal-driven, and when you dance to it you dance because you feel good".
He says he was encouraged through his older brother's love of church music. "We shared a room. At night he would play his guitar and I would listen to him sing."
Rayner, an architecture student at Auckland University, says his father's experience in the industry motivated him to pursue his own music career. "I don't think I would have done it if I hadn't seen him do it all before."
The duo's quick success resulted in a bit of a backlash from other musicians and music critics. "Doing our last tour fixed a lot of problems. No one had seen us play; they had only heard us on YouTube so we were able to earn some respect.
"Getting the Coachella gig has shut the haters up."
Coachella April 13-15 and 20-22