If it's only one "pin" you could solder a wire from the picasso4 to the concierto directly...
BTW, I also own a concierto and its behaviour is a little strange...
I have some questions, I hope you can help me...
a) what AHI version do you use?
b) what driver version do you use? where can I download it?
c) what frequency, channels have you set up? I mean... what's your AHI configuration?
My concierto produces a BEEEEP when I boot my miggy, that seems ok and shows me that it's alive...
If I load dynamite it outputs no sound, BUT if I go to the prefs and change the AHI frequency settings it outputs sound... it doesn't matter if I save the settings, next time I have to change the frequency again to make it output sounds.
If I load AmigaAMP, SongPlayer or Amplifier it crashes :-/
Any idea? as the sources of the driver are included I guess I could recompile the driver to force it to change the frequency at the init stage but I've never compiled a driver, are they normal "exes"?
