Like _Calculating Infinity_ on a lethal cocktail of anabolic steroids, The Final Sigh throw hardcore, jazz, grind and even Future Sound of London-style electronica into a mix that could only ever equal a densely layed, but almost constantly full-blown sonic bedlam. Coupled with a production sound that's anything but slick, _If You're Not Part of the Solution..._ sounds in no way manufactured or pretty, and understandably at times the nigh on constant bludgeoning of songs like "Don't Make Dirty Movies" won't be up everyone's street. For one of the purest and most interesting musical manifestations of anger since the last Burnt by the Sun record however, you need look no further.