The duo is joined periodically by the Wm. B. Kennedy Chamber Ensemble (strings and piano). The latter also on occasion state a theme alone.
The dramatically effective use of free drumming along with motives and development on tenor--laced with interludes of general improvised freedom--and an enriched sound with occasional chamber support mean that Ghost Trees do much more with what on the surface seems at first a simple set of premises, less. They end up with something not really so simple at all, something extremely evocative and attractive.
I would recommend highly that you listen to this one. You can check out a sample track at http://ghost-trees.bandcamp.com/album/the-new-gravity and also find out how to order the vinyl. It puts a rather different spin on "freedom" and ends up giving us very good music from beginning to end.