20 Years of Underground Sonics

20 Years of Underground Sonics is a various artists compilation marking two decades of Kasra's Critical Music, gathering 22 exclusive tracks across the breadth of the label's drum and bass sound. Contributors include Halogenix, Calibre, Kasra, Particle, gyrofield and Mefjus. It follows an earlier 15 Years of Underground Sonics compilation, and its physical edition arrived as a strictly limited six piece vinyl box set.