> one keyboard connected to the > computer via one MIDI interface and the other connected to a networked > machine via another interface That would mean one MIDI stream would come across Ethernet into something like iMIDI or one half of the Giga-Teleport thing, the latter of which you obviously know more than I do. >how can he see where his MIDI activity > comes from, in other words, can MIDI monitor show him which keyboard > the signal actually comes from? No, not even from within two or more local MIDI interfaces. Apart from the fact that with just local interfaces you can always tap single in ports and colour the data to your liking, or, more generally, send from both keyboards on different channels. Christian -- homepage http://uk.geocities.com/christianobermaier/home.htm