It’s Blitz!, the Yeah Yeah Yeahs’ first full-length album in three years, delivers listeners the band’s brand new sound — one that trades meaty guitar riffs and guttural yelps for a synthesizer and disco backbeats. With these simple tools, the Yeah Yeah Yeahs generate an inspired and hopelessly catchy sound — one that is all at once familiar and groundbreaking. “Zero,” the album’s opener, provides a bright pulsing beat ready for any club, and “Hysteric” smartly reminds us of Karen O’s vulnerability and music-making genius. The album is quite a departure from the wild, neck-throttling rants that put them on the map. It might take die-hard fans some getting used to, but that’s precisely the intention. It’s fresh. It’s understated. It’s mature. It’s blitz!