hallo kjetil, sorry for nerving, but mammut also is broken here in the moment. it obviously has some problems with jack (0.109.2 here). i just recompiled mammut two days ago using juse-v1.44, but it does not solve the problem. starting in the console: nowhiskey@murija2:~$ mammut gakk gakk I am drawing GUI_init() oggtell SSE2 detected zombified - calling shutdown handler Mammut, error: JACK shut down. Warning. Cannot connect to jack output port 0: "system:playback_1". Warning. Cannot connect to jack output port 1: "system:playback_2". Warning. Cannot connect to jack output port 2: "system:playback_3". Warning. Cannot connect to jack output port 3: "system:playback_4". Warning. Cannot connect to jack output port 4: "system:playback_5". Warning. Cannot connect to jack output port 5: "system:playback_6". Warning. Cannot connect to jack output port 6: "system:playback_7". Warning. Cannot connect to jack output port 7: "system:playback_8". Warning. Cannot connect to jack output port 8: "system:playback_9". Warning. Cannot connect to jack output port 9: "system:playback_10". Warning. Cannot connect to jack output port 10: "system:playback_11". Warning. Cannot connect to jack output port 11: "system:playback_12". Warning. Cannot connect to jack output port 12: "system:playback_13". Warning. Cannot connect to jack output port 13: "system:playback_14". Warning. Cannot connect to jack output port 14: "system:playback_15". Warning. Cannot connect to jack output port 15: "system:playback_16". Warning. Cannot connect to jack output port 16: "system:playback_17". Warning. Cannot connect to jack output port 17: "system:playback_18". ....... mammut prints an error message window: jack shut down. ........ i can actually see it in the qjack's audio tab, but not able to connect. also the gui is started. if you think, i could provide you more useful information, just tell me what! cheers, doc