OM

OM (Switzerland) represents a vital node in the European jazz-rock and free-fusion movement of the 1970s. Formed in Lucerne in 1972, the quartet - comprising Urs Leimgruber, Christy Doran, Bobby Burri, and Fredy Studer - took their name from John Coltrane's 1965 album, signaling a commitment to spiritual intensity and structural openness.

Their sound identity is defined by the 'Electric Jazz' ethos, which integrated the volume and distortion of rock (notably Jimi Hendrix) with the non-linear improvisational techniques of the avant-garde. Throughout their tenure on the ECM label, they carved out a niche that was significantly more aggressive and 'raw' than the label's typical chamber-jazz aesthetic. Their career arc saw them evolve from dense, convulsive free-form explorations to more structured, though still highly experimental, fusion. Critically, they are regarded as one of the most important Swiss contributions to the global jazz-rock canon, influencing later generations of 'noise-jazz' and experimental improvisers through their uncompromising approach to volume and texture.