Hi all, I sent this e-mail just to share an experience with other potential users of MusE. For some month MusE was not able to connect to jack when started as normal user, but was working properly as root. In fact muse was a jack client but inactive when started as normal user. I was thinking it was my setup or a bug, but today, after trying 0.6.3, I have found the bug : The old configuration file ~/.MusE was causing the problem !! Since this file was not present in the root directory I was getting a message : NO Config File </root/.MusE> but MusE was starting fine. I have deleted the .MusE file in my home directory and now I can start MusE without being root !!! I should have think to that before since I have had a similar problem with spiralsynthmodular before ;-) Christophe