I just changed "Using an ALSA Loopback device ..." section into the wiki. It now use the zita-bridge software. It is so better, that it was not worth to keep the old version with jack_in and jack_out.
http://proaudio.tuxfamily.org/wiki/index.php?title=DAW_Digital_Audio_Workstation#Using_an_ALSA_Loopback_device_and_zita-ajbridge Dominique -- "We have the heroes we deserve."
