Ah, I didn't check that. So that's why I dont see a different when I compile it with slv2-0.5 or slv2-0.4 on my system. The first time I use elven it start up a lot faster than it do now. At this point, I'am not a programmer, I'am only a interresstet user, so I would like to ask if you plan to give elven a generic Gui to enable make settings to the effekts ? I would realy like to see a tool like jackrack for lv2. reegards hermann