You may know his work better than his name, but L.A. producer, engineer, and mixer Rich Costey is a hot commodity in the alternative world. He helped boost Muse's dystopic rock to cosmic heights; he assisted The Joy Formidable on one of their first big hits; and he worked alongside Death Cab for Cutie on their eighth album, giving their melancholic indie pop a lustrous, electro-tinged sheen.