My experience with protools and creating albums that have the similar feel to agib this is what i can say. I feel that what that means is that they laid a basic track to kind of set up the song. Then overdubbed a lot over it. And by a lot i mean so much it makes your brain want to explode. This could also mean that they did several tracks with the band overdubbed them together and added other overdubs, basically making it impossible to play live with the number of members that they had recording on that album. I really wish we could ask jeff this question.