For a band, longevity is a double-edged sword. It means that an artistís music has the power to sustain over time but it also means that evolution is necessary. Sometimes that progression is organic and slow while other times itís urged, driven by a desire to change and grow. That is where we find Bay Area rock band Dredg today, on the brink of releasing their fifth album in over 15 years. The bandís new album, Chuckles and Mr. Squeezy, is a far cry from their 1998 debut Leitmotif-and even from their most recent disc, 2009′s The Pariah, The Parrot, The Delusion-but now, looking back, you can see band whoíve transformed themselves again and again of their own volition.