Jack has finally reached version 0.100.0. In brief, more functions for getting latency statistics, better thread handling, and a more verbose way of connecting to the jackd server. This new function is jack_client_open(). From the documentation: Open an external client session with a JACK server. This interface is more complex but more powerful than jack_client_new(). With it, clients may choose which of several servers to connect, and control whether and how to start the server automatically, if it was not already running. There is also an option for JACK to generate a unique client name, when necessary. Jack-0.100.0 is available from http://jackit.sf.net, although a new website is in the works. ***CHANGES*** Rewritten coreaudio driver Switched to ALSA-1.0 API Added functions jack_client_create_thread(), jack_get_max_delayed_usecs(), jack_reset_max_delayed_usecs(), jack_internal_client_handle(), jack_internal_client_load(), jack_get_internal_client_name(), jack_internal_client_unload(), jack_get_xrun_delayed_usecs(), jack_client_open(), and jack_get_client_name(). See documentation for details. Removed functions jack_set_server_dir(), jack_create_thread() Added header file <jack/statistics.h> ALSA, OSS, and CoreAudio drivers now have -I/-O options for setting systemic latency. Added client request type RecomputeTotalLatencies Compiles and runs on MacOSX 10.4 Change the way threads get RT scheduling. it is now requested by the thread rather than assigned by the thread's parent. in cases where capabilities are used, the child is also given capabilities so that it can release + re-acquire RT scheduling as needed. Prevent watchdog from killing anything is JACK is freewheeling. And of course tons of bug fixes. Sincerely, Taybin Rutkin