Austrian early music group Ensemble Unicorn made a CD containing all the pieces from the British Museum MS mentioned above.

Like many of the groups that play this music they seem to follow the "faster the better" philosophy. Very virtuosic but wearing after a while. I think it would be better if they were to take it a little slower. That said it is an excellent CD. Here is a clip of them playing part of Chominciamento di gioia: http://www.youtube.com/watch?v=ntb6gu6K7Is

Here is my attempt at Lamento di Tristano/La Rotta