A struggle for many hard rock bands is how to "mature" without getting boring. Apparently, we don't have to worry about that happening to Deftones. On "Tempest," from this year's Koi No Yokan
, the quintet start out with a gentle, radio-friendly instrumental opening before slowly building the tension and tunefulness. Fans of the band's more sonically pummeling earlier years may sniff at "Tempest" and call it a sellout, but the sophistication on display here is stunning in its own way.