Dave Grohl sounds hoarse. On a day off from the Foo Fighters’ current North American tour, the frontman comes off as typically amiable, but he blew out his vocal cords during a marathon, career-spanning gig the previous night. “My voice is the least of my worries at this moment,” he rasps jovially. The band made that show, though, thanks in part to a Medieval-looking throne of rock, adorned with flashing lights, guitar necks and a cradle for the frontman’s leg — a vision Grohl says he dreamt up while heavily medicated on OxyContin.
