The Legends Of Music on Instagram: "Billy Cobham performing “Spectrum” Live in Norway in ’74 Spectrum is more than a drummer’s solo debut—it’s a seismic event in jazz-rock fusion. Released in 1973 after Cobham’s trailblazing work with Miles Davis and the Mahavishnu Orchestra, the album finds him stepping out as not just a rhythmic force, but a visionary composer. The opening track, “Quadrant 4,” announces its intentions with ferocious clarity—explosive double bass drumming, lightning-fast unison