In need of help from an Opethian guitarist

Yeah, the rest are definitely DADFAD. Mike doesn't know what he wrote his material in, clearly. Exactly. I'd believe Mike when he says the open D material was in DADFAE.

antipunx13: I always thought BTM was in standard E, but then again my ears aren't as accustomed to low Ds on a guitar as they are to low Ds on bass (the bass is definitely in drop D on BTM).

I'd believe him too, I was just asking for a link to confirm that he said it in the first place because I'd honestly never read a GR interview. I'll probably just take your word for it...does seem to make some GoP parts easier so far.
 
it was in an audio interview when fred joined the band, I think it was a talking metal interview. search my posts, I posted a direct quote from it a couple months ago