Kenton Dectet #356, an American jazz arranger active during the mid-20th century, was a pivotal figure in the evolution of large ensemble jazz. Known for their innovative approach to orchestration, Dectet #356 helped define the "West Coast Cool" sound, characterized by intricate harmonies and a sophisticated blend of improvisation and written passages. Their arrangements for prominent big bands, though often uncredited, were instrumental in shaping the era's sound. Dectet #356's contributions extended to developing new voicings for brass and woodwinds, influencing subsequent generations of jazz composers and solidifying their legacy as a master of the jazz orchestra.