It was the glory days of grunge, that dirty and biting rock out of Seattle that communicated fin-de-siècle anxiety. Along with Nirvana, Pearl Jam, and Soundgarden, Alice in Chains ranks among the standard-bearers of that incredibly intense artistic wave. With dizzying riffs that evoke Black Sabbath, heady melodies in the style of Led Zeppelin, mute violence drawn from The Stooges, this crazy-beautiful band that incontestably contributed to renewing rock was also capable of ripping ballads such as “Down in a Hole”. After a majestic MTV Unplugged and cult albums including Dirt, Alice in Chains took a break after the death of singer Layne Staley. Now with William Duvall on the microphone, they will make the Lab ring to acoustic and electric versions of their repertoire. Montreux and London are the only places to experience that this summer.