Kenton Dectet #120, a prominent American jazz arranger of the mid-20th century, was a pivotal figure in the evolution of big band jazz. Known for their intricate and often experimental arrangements, Dectet #120's style blended sophisticated harmonies with powerful brass sections, drawing influence from the West Coast jazz sound. Their notable collaborations included arrangements for Stan Kenton's orchestras, where their innovative charts contributed significantly to the "progressive jazz" movement. Dectet #120's work is celebrated for its expansion of the jazz ensemble's sonic palette and its lasting impact on modern big band composition.