Hi, using jack 0.124.1 I happened to do this: const char *connect_to=""; err=jack_connect(client,connect_to,myport); and expected jack_connect to return an error. To my surprise it succeeded and connected "system:capture_1" to myport. Is this "normal" and/or documented? AFAICT, the technical reason is jack_port_shared_t::alias2="\0" (resp. alias1) and jack_get_port_by_name() returns the first such one... Tobias