Why do jazz musicians make pathetically anemic sounds when they turn their talents to popular music? Otherwise exemplary improvisational musicians are invariably inept in rock, pop, R&B and hip-hop contexts. Happily, there are exceptions to the rule. Candid is a recent instance. Five vaunted heroes of underground music- Tim Berne, David Torn, Marc Ducret, Devin Hoff and Ches Smith- successfully meld post-punk noise with free jazz on the 71-minute album. Mean and dirty, Candid is what might have resulted had Peter Brötzmann been a founding member of Sonic Youth or what might happen if Mats Gustafsson sat in with Godspeed You! Black Emperor. Affiliates of the jazz police and punk purists will be repelled, but tracks like "Craw" are as natural as they are necessary.