[Jackaudio] Properties

Hi, I am trying to use properties, but I might be missing something: I tried multiple variations: jack_property -l Jack: JackClient::SetupDriverSync driver sem in flush mode Jack: JackLinuxFutex::Connect name = jack_sem.1002_default_jack-property Jack: Clock source : system clock via clock_gettime Jack: JackLibClient::Open name = jack-property refnum = 7 could not retrieve all properties jack_property -ps system:capture_1 http://jackaudio.org/metadata/pretty-name "Toto" Jack: JackClient::SetupDriverSync driver sem in flush mode Jack: JackLinuxFutex::Connect name = jack_sem.1002_default_jack-property Jack: Clock source : system clock via clock_gettime Jack: JackLibClient::Open name = jack-property refnum = 7 Jack: jack_set_property ext_client 246af040 client 246af040 cannot set value for key Toto of system:capture_1 jack_property -p -s system:capture_1 "Toto" http://jackaudio.org/metadata/pretty-name Jack: JackClient::SetupDriverSync driver sem in flush mode Jack: JackLinuxFutex::Connect name = jack_sem.1002_default_jack-property Jack: Clock source : system clock via clock_gettime Jack: JackLibClient::Open name = jack-property refnum = 7 Jack: jack_set_property ext_client 51646040 client 51646040 cannot set value for key http://jackaudio.org/metadata/pretty-name of system:capture_1 I am using jack-audio-connection-kit-1.9.14-2 Bruno