by Ron WynnUnusual instrumentation and unpredictable, eclectic material has been Arcado's trademark. The interplay between violinist Mark Feldman, bassist Mark Dresser and cellist Hank Roberts over their albums has been sometimes chaotic, sometimes inspirational but never pedestrian or cliched. They write and perform mainly original material, and draw on everything from '60s free to heavy metal, funk, rock, contemporary classical and hard bop.