this looks a bit strange to me but this message says it all:
...the playback device "hw:1,0" is already in use. Please stop the application using it and run JACK again...
i can't tell it for sure, because those dutch messages aren't any clear to me, but this one is from jackd and it clearly says that something is already using the soundcard device at the time you start qjackctl. could it be pulseaudio ? and why -n6 ? what soundcard is this hw:1? you ought to get it right with -n2 (periods/buffer) or maybe -n3. anything above that is, how can i say, non optimal.
this looks a bit strange to me but this message says it all:
the playback device "hw:1,0" is already in use. Please stop the application using it and run JACK again...i can't tell it for sure, because those dutch messages aren't any clear to me, but this one is from jackd and it clearly says that something is already using the soundcard device at the time you start qjackctl. could it be pulseaudio ? and why -n6 ? what soundcard is this hw:1? you ought to get it right with -n2 (periods/buffer) or maybe -n3. anything above that is, how can i say, non optimal.
seeya