Another watershed development of 1967 was "Are You Experienced", the debut album by American rock guitarist Jimi Hendrix which used recording studio technology as an impressionist instrument, with backwards drums, harmonic feedback and new devices like the Octavia guitar effect, designed by Roger Mayer, to create new sonic textures heavily influenced by science-fiction and psychedelia, and featuring the heightened instrumental virtuosity which would become a hallmark of Progressive Rock. "Few debut albums have altered the course of rock to the extent that Are You Experienced, the full-length bow from the Jimi Hendrix Experience, did in the spring of 1967... the LP not only showcased Hendrix’s remarkably inventive guitar playing, but also combined R&B, blues, psychedelia, pop, heavy rock and even jazz in a way that no one had ever done (or even imagined) before. "