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[BefriendedUnit]

Vocals: Mikael Åkerfeldt -mid range growls
guest Vocals: Corpsegrinder -low range growls
guest Vocals: Chuck Schuldiner -high range growls
+the rest of Opeth.

They would phrase everything identically, creating the layered vocal effect like on Demon of the Fall or Blackwater Park.

 

[Twelveby5]

Geezer Butler - Bass
Keith Moon (R.I.P) - Drums
Trey Anastasio - Guitars
Mike Åkerfeldt - Guitars
Steve Winwood - Keyboards
Produced by: Steve Wilson
Sound Engineer - Me