it is in open d minor one half step down according to steve if i rememer correctly. maybe it is the same for believe in nothing, otherwise it is in standard, cause i think this one is on seven strings, while insiginfant apparently is on 6. Steve please corrct me cause i think i'm wrong herei think insignificant was drop D a half step down...
As far as memory serves_, the distorted rhythms are in Eb standard, and I believe Jeff showed me the acoustic riff in Eb open tuning: Lo to Hi: Eb Bb Eb G Bb Eb. Hope that helps,and sorry for the delay in answering.