Muse spent the past few years pushing the sonic boundaries of rock & roll, creating increasingly bombastic music that utilized symphonies, choirs, synthesizers and, in the case of 2012’s The 2nd Law, Skrillex-inspired dubstep sounds. But when they began plotting out Drones, their politically-charged seventh album inspired by the expanded use of drone warfare across the globe, the trio decided it was time to radically strip things down.