Billy Cobham is one of the greatest jazz-fusion drummers of recent decades. Shortly after leaving the band Mahavishnu Orchestra, he released his debut solo album, Spectrum. Influenced by the music of Miles Davis, he combines elements of jazz with rock and psychedelia. From the subtle parts to the more aggressive moments, it's an album in which Cobham showcases his identity to the public. The music quartet recorded some lengthy pieces, with "Stratus" being the absolute masterpiece. The funky grooves and effective guitar melodies blend together seamlessly, bringing the jazz to life through Cobham's outstanding drum play. "Quadrant 4" is another great track where the music erupts, and the synergy between the musicians is palpable.