If you've been to a club in the last year, you've probably heard a track from DJ duo GTA rattling the ceiling at some point during the bleary, blurred night. They make music that's engineered to be heard in a dark, loud room with a thousand sweaty strangers churning against you; unpleasant for some, but intensely awesome for others. It's immediate release—music that needs no more validation than how you feel when it hits you.According to Julio Mejia, who makes up one half of the group, that take-it-as-you-go mentality has been a part of their career. Take, for example, their 19-country tour with Rihanna. "We got a video chat from our manager and he's like, 'Okay, I got some crazy news for you guys. In like ten days, you guys are going on a two-month tour in Europe with Rihanna,'" he says. "We're like, 'Man, two months in Europe is awesome. With Rihanna, it's a crazy life experience."When your music is born from serendipity, you may as well roll with the experience. "We met through Facebook, really," says Mejia's partner, Van Toth. "We had a mutual friend and he linked us up when we were making music and started giving feedback on on our tracks and stuff to each other. We made a track together just randomly and that's how that happened."From there came the studio, where the two began producing tracks that got all of their friends hyped. "That really helped blow us up and get our names around to other DJs and people that were listening to it," he says. "From there, Dimitri and Like Mike hit us up to work on a track with them and that ended up being number one on Billboard, which was huge." (He's referring to "Turn It Up," the club-packing smash single produced with Dimitri Vegas and Like Mike.)The two might be headed all over the globe, but they've still got to figure out how to replicate a big sound when they work from a quiet neighborhood. "We really just try to make the kind of stuff we imagine would go off in a club," says Mejia. Adds Toth, "We try to close all the curtains and play with all the mics to get the atmosphere and see if the same effect will happen. It usually doesn't work, but it makes for a cool light show in here." As long as it's happening in the real world, that'll be good enough.