I get this from jack (using the planet-ccrma kernel fedora 13 64bit):
JACK server starting in realtime mode with priority 60
creating alsa driver ... hw:0|hw:0|256|3|44100|0|0|nomon|swmeter|-|32bit
Using ALSA driver USB-Audio running on card 0 - EDIROL PCR-1 at
usb-0000:00:1a.0-1.2.1, full speed
ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to
capture-only mode
Cannot initialize driver
JackServer::Open() failed with -1
Failed to start server
22:24:33.653 JACK was stopped with exit status=255.
22:24:33.653 Post-shutdown script...
22:24:33.653 killall jackd
jackd: nenhum processo abortado
22:24:34.075 Post-shutdown script terminated with exit status=256.
22:24:35.750 Could not connect to JACK server as client. - Overall
operation failed. - Unable to connect to server. Please check the
messages window for more info.
Cannot connect to server socket err = Arquivo ou diretório não encontrado
Cannot connect to server socket
jack server is not running or cannot be started