Spectrum was an Australian progressive rock and psychedelic band that was formed in 1969 by Ray Arnott, and consisted of Mike Rudd, Bill Putt, Mark Kennedy, Ray Arnott, Lee Neale and John Mills. Initially, the band drew on the work of contemporary bands like Traffic, Soft Machine and Pink Floyd and played covers of music by these groups, but they soon developed their own style. Alongside Putt's bass playing and Neale's keyboard work, a key feature of the band's sound was Rudd's guitar playing—he was one of the few rock guitar players at that time who eschewed the near-universal use of the guitar pick, preferring to play electric guitar with a finger-picking style. Combined with contemporary improvements in amplification and recording, his playing technique and his use of a vintage Fender Stratocaster guitar allowed Rudd to develop a highly characteristic sound. And now, you may download Spectrum's most successful album, Celtic Alchemy, in mp3 from our site. The album spawned two singles, "Celtic Alchemy-Nothing Is True" and "Moonstone".