Korn = A standard (7 string). They recorded parts of the first album with a Les Paul, from what I heard, tuned to D-standard for more clarity of the higher parts. I had heard they were going to start using 8 strings within the last couple years, even saw a pic that was supposed to be Munky's custom 8 string, but I've never heard/seen anything further than that.
Fear Factory:
- SOANM/Demanufacutre = B standard
- everything else = A standard (7 string)
Divine Heresy = A standard (7 string). F# for 8th string when 8string is used. I'm pretty sure, at least...
Meshuggah:
- Contradictions Collapse = Eb standard
- None/DEP/Chaosphere = Bb standard (7 string)
- Nothing = Bb standard, low F on 7th string (omitting the high Eb).
Thier Nevborn prototypes were so bad in holding the tuning, they just used Ibanez 7s tuned down to the lower half of the 8 strings.
- I ep/Catch33/obZen = 8 string, Bb standard w/ low F on 8th string.
At The Gates = B standard
There are demos of songs in Db standard that I've heard, but the albums ended up in B standard.
Carcass = B standard
Soilwork = pretty much B standard, I think...at least everything up until Figure #5
Nevermore:
- s/t = "What Tomorrow Knows" is in D standard...I think the rest is in Eb standard
- In Memory/Politics/DNB = Eb standard
- DHIADW = Bb standard (7 string)
- EoR = Bb standard (7 string). Pretty sure "Seed Awakening" is Db standard on a 6 string.
- TGE = Bb standard (7 string). Pretty sure "The Psalm Of Lydia" is Db standard on a 6 string, but I saw a guitar world lesson and he was playing it on his 7...so I dunno.