Half a step down from standard, used by bands such as Emmure, TesseracT and Meshuggah in their earlier days, Jeff Loomis (now formerly of Nevermore), Cannibal Corpse mid-career, ERRA, Hypocrisy on End of Disclosure, Adema, American Head Charge, Sonata Arctica in their album Unia, Mushroomhead, Korn in Neidermeyer's Mind demo album, Revocation, Dir En Grey since "Dum Spiro Spero," After The Burial on Forging a Future Self album, Chad Kroeger of Nickelback on the song "This Means War" (Ryan Peake used a six-string), Slayer (on War Zone and Here Comes the Pain from God Hates Us All), and Trivium on Silence in the Snow, The Sin and the Sentence, and all live performances of songs previously written on standard tuned seven string guitars.
The electric guitar was born out of necessity. Going back to the big band era, acoustic guitar players needed an instrument that could be heard over all the brass and woodwind instruments. They also need to be heard over the banjos and mandolins on the front porch. In the 1930s, companies such as Rickenbacker and Gibson started to add guitar pickups to their instruments, which allowed musicians to plug them into an amplifier for added volume. Rickenbacker added a pickup to their Hawaiian guitar (also known as a lap steel guitar) “Frying Pan” model, and similarly, Gibson added a pickup to their electric Hawaiian EH-150 model. Soon after that, Gibson introduced the iconic ES-150, which gave players the very best of both worlds. It gave guitarists a world-class Gibson hollow body guitar with a built-in pickup, which made it the perfect fit for guitarists who played large ensembles. In 1951, Fender revolutionized the electric guitar market even further by unveiling the first ever mass-produced solid body electric guitar, now known as the Telecaster, which was introduced in order to combat the feedback that hollow body electric guitars produced. Then in 1952, Gibson worked closely with one of the most widely respected guitarists of the era to create the first Gibson solid body electric guitar, now known as the Les Paul and named after its co-inventor.