No sound from Jack (10.6)

[pc_junk@…]

Hi,

I have installed the Jack port and although this superficially appears to be running I can't get any audio output -

~ % jackd -d coreaudio -l
jackd 0.116.2
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with POSIX SHM support.
loading driver ..
ICI
Device name = 'Built-in Input', internal_name = 'AppleHDAEngineInput:1' (to be used as -d parameter)
ICI
Device name = 'Built-in Output', internal_name = 'AppleHDAEngineOutput:0' (to be used as -d parameter)

~ % jack_lsp -A
system:playback_1
   coreaudio:Built-in Output:in1
system:playback_2
   coreaudio:Built-in Output:in2

% jack_metro -b 100
(...no output)

Any ideas ?

[pc_junk@…]

Another go with the command output wikified -

~ % jackd -d coreaudio -l 
jackd 0.116.2 
Copyright 2001-2005 Paul Davis and others. 
jackd comes with ABSOLUTELY NO WARRANTY 
This is free software, and you are welcome to redistribute it 
under certain conditions; see the file COPYING for details

JACK compiled with POSIX SHM support. loading driver .. 
ICI 
Device name = 'Built-in Input', internal_name = 'AppleHDAEngineInput:1' (to be used as -d parameter) 
ICI
Device name = 'Built-in Output', internal_name = 'AppleHDAEngineOutput:0' (to be used as -d parameter)

~ % jack_lsp -A 
system:playback_1
   coreaudio:Built-in Output:in1
system:playback_2
   coreaudio:Built-in Output:in2

% jack_metro -b 100 
(...no output)