I was poking around the Rosegarden-User list archives last night (looking ofr an answer for an unrelated question) and saw a post from Sept. that the jack transport code was commented out - the checkboxes are still in the GUI, but they don't actually do anything yet. I assume that's still the case since after fixing one of my problems I tried to use it as a transport slave in Ardour and no joy. I can't get muse to actually produce noise yet, so I can't comment on it. HTH David