Dropped A tuning

Dropped A tuning is an alternate tuning for a 7 string guitar where the lowest string is tuned down ("dropped") from the standard B by one whole step to A as follows A1-E2-A2-D3-G3-B3-E4. Also, for a 6 string guitar, dropped A tuning is achieved by tuning all strings down a 4th with the lowest string tuned 1 additional step down as follows A1-E2-A2-D3-F#3-B3. This is a "drop 1" tuning in the key of B (i.e. tune the whole guitar down a perfect fourth from standard tuning, then tune the 6th string a whole step down). As a result, it uses the same fingering as drop D tuning and drop C tuning.

An alternate dropped A tuning utilizes a guitar tuned to E Standard with the 6th string dropped to a low A, resulting in AADGBE with the 6th and 5th strings an octave apart.

Another variation of this tuning is AEADGB, which imitates a 7 on a six-string, excluding the high E.

Another dropped A tuning is AGCFAD ("drop perfect fourth in the key of the D", i.e. whole guitar is tuned down one step, then the lowest string is dropped to A).

AEADGBE / AEADF#B

208 Talks of Angels (on the song "Spiral Of Silence")
Amon Amarth (on some songs)
A.N.I.M.A.L. - from "Poder Latino" to "Combativo" albums.
Bloodbath
Blotted Science
Chelsea Grin
Coheed and Cambria (on the song "Gravity's Union")
Conquering Dystopia
C.J. Pierce of Drowning Pool (on the song "Turn So Cold")
Desolated
Distoriam
DragonForce (on the song "Three Hammers")^[1]
Dream Theater (on the songs "Blind Faith", "These Walls", "I Walk Beside You", "Sacrificed Sons", and "Illumination Theory")
Emmure
Fei Comodo
Filter (in the songs "Columind" and "The Missing" from The Amalgamut)
Zoltan Bathory and Jason Hook of Five Finger Death Punch (on the songs "Remember Everything" and "Dot Your Eyes")
Peter Tagtgren of Hypocrisy
Ill Niño (on its Dead New World album)
Impending Doom
In This Moment
Ty Tabor of King's X^[2]
Buzz Osborne of The Melvins
Muse (on the songs "Citizen Erased", "Liquid State" and "Supremacy".)
Like Moths To Flames
Nile
Oceano
Pain
Pallbearer (band)
Periphery
Pickaxe to the Forehead
RED
Slipknot
Suicide Silence
Sunn O)))
Thy Art Is Murder
Whitechapel (band)
Carnifex
Lacuna Coil
Delain
Within Temptation(on some songs from the Silent Force album)
Winterfylleth (on some songs)
Amaranthe (on some songs)
Volumes (band)
Motionless in White
Crowbar
Chunk! No, Captain Chunk

AADGBE

Every Time I Die on "Moor" from From Parts Unknown and "Indian Giver" on Ex Lives
Filter (on "Welcome to the Fold")
Foo Fighters (on "Stacked Actors")
Helmet (on "Biscuits for Smut")
Weasel Walter of Lake of Dracula
Melvins (on "Boris")
Neurosis (the album Through Silver in Blood and on)
Oxygen Thief (on "Self-Righting Mechanism" from album The Half-Life of Facts and EP One Day This Will All Be Fields)
Radiohead (on "Bangers + Mash")
Them Crooked Vultures (on "No One Loves Me & Neither Do I", "Warsaw or the First Breath You Take After You Give Up" and "Caligulove")
Dez and Jo of The Safety Fire^[3]
Torche
Muse (on "Citizen Erased")