with a 'high a' Used by Rusty Cooley.All fourths tuning - F'-B'-E-A-d-g-c'-f'Regular tuning which extends range a half step higher. DroppedDrop E 8-string tuning - E-B-E-A-D-G-B-EA combination of standard 7-string tuning and the 8th string dropped one full step from F to E. Allows to play in the range of a standard electric bass, as well as one-finger power chords. Used by Animals as Leaders on most songs. and Whitechapel (on the songs "Devolver" and "Breeding Violence" from A New Era of Corruption) Also used by Deftones on Koi No Yokan and Gore, Allegaeon, and Emmure on the song "N.I.A. (News in Arizona)". An open variation of this tuning is used by Hacktivist with 3rd and 4th strings tuned a whole step up to A and E respectively (E-B-E-A-E-A-B-E). Also used by Born of Osiris on the songs "Silence the Echo" and "Crossface", Chelsea Grin on more recent material and exclusively used by Carcosa. Fractalize also used this tuning on "Visions" from the Phophet Of Despair EP and "Sightless" from the Immersion album.Drop A + E 8-string tuning - E-A-E-A-D-G-B-EA combination of 7-string drop A tuning and an 8th string dropped one full step from F to E, allowing both power chords rooted on A, and easy fingering with the E a fourth below. This is the tuning of the lowest two strings of a bass, along with all strings of a standard 6-string guitar in standard tuning. It is used by Rings Of Saturn on the album Lugal Ki En and Mick Gordon on much of his work on the DOOM and DOOM Eternal soundtracks, notably Rip And Tear, BFG Division and Meathook.Drop A + E (variation) - E-A-E-A-D-F-B-EA variation on Drop E, A with the G flattened one half step to F; this tuning is identical to 6-string Drop A, with two E strings added: one above, and one below. Like Drop E + A; this tuning allows easy fingering on the E since it is a standard fourth interval below the A. It also provides three high strings a fourth apart instead of the usual two. The tuning is used by Infant Annihilator on their albums The Elysian Grandeval Galèriarch and The Battle of Yaldabaoth.Drop E/D 8-string tuning - E-B-E-A-D-G-B-EHalf a step down from drop E tuning. Used by Meshuggah in the album Catch Thirty-Three, in the song Shed and used by Emmure in the album Speaker