Hi everyone, after the report here from Ben McAllister that he could not get Csound to talk to the JackOSX server, I have downloaded the latest Jack, which uses Jackdmp 1.9.2, started csound with -+rtaudio=jack and had no problems playing through it. The csound is a CVS build, but was compiled in the same way as the released 5.10. What might have happened is that if you installed Csound AFTER jackOSX then Csound would use a different version than the installed Jack server. Reinstalling the Jack server will sort this out. I will try and devise a cleverer way of delivering the Jack component for next time as this has always been unsatisfactory. Regards Victor Dr Victor Lazzarini, Senior Lecturer, Dept. of Music,National University of Ireland, Maynooth