Boston founder, guitarist, and primary songwriter Tom Scholz's blend of musical styles, ranging from classical to 1960s English pop, has resulted in a unique sound, most consistently realized on the first two albums ("Boston" and "Don't Look Back"). This sound is characterized by multiple lead and blended harmonies guitar work (usually harmonized in thirds), often alternating between and then mixing electric and acoustic guitars. The band's harmonic style has been characterized as being "violin-like" without using synthesizers. Scholz is well-regarded for the development of complex, multi-tracked guitar harmonies. Another contributing factor is the use of handmade, high tech equipment, such as the Rockman, used by artists such as Journey guitarist Neal Schon, the band ZZ Top, and Ted Nugent. Def Leppard's album "Hysteria" was created using only Rockman technology. Scholz's production style combines deep, aggressive, comparatively short guitar riffing and nearly ethereal, generally longer note vocal harmonies. A heavier, lower, and darker overall approach came in the next two albums ("Third Stage" and "Walk On"). The original track "Higher Power", on the "Greatest Hits" album, exhibits a near Neue Deutsche Härte and almost techno influence with its sequencer-sounding keyboards, a sound most fully realized on "Corporate America"'s title track.