What tuning is this?

Question

aha noob question, but oh well.

I play bass, and I came across this (A Tout Le Monde - Megadeth)

Gb|---------------------------------|

Db|---------------------------------|

Ab|---------------------------------|

Eb|-2-2-2-2-2-0-2-2-2-2-2-2-2-2-2-0-|

What tuning is that? (Drop D etc)? :) thanks!!

Answer 1

It's down 1/2 step. All strings are 1/2 step low.

Answer 2

It's just Drop Eb. It's just a normal altered tuning like drop D. If you look up altered tunings you'll see there's much more than just drop D and Eb.