@@ivanalkemist no, it's actually a Lynyrd Skynyrd reference, because Free Bird was their most played song live as an encore, I think. It became a recurring joke in concerts.
yeah, I've been experimenting and got to the conclussion it was something like 0 0 0 then the note, but your explanation could fill out the gap I was having with the first notes... THANKS!
This and the title track are two of the most beautiful Opeth songs ever - and this is coming from someone who find a the album Heritage to be largely mediocre...