From rooms dimly lit by black light posters and lava lamps and out of the heavy, masking smell of incense comes the stoner rock genre. Inspired by Black Sabbath and Blue Cheer, this hard rock style feature guitars as loud as they are distorted played by guys with really long hair. Recalling Monster Magnet and Mudhoney there is now a third wave of keepers of the flame. Sweden’s Mammoth Volume is a potent voice in that movement. – Tom Schulte