"Wheaton, Simon" <simon.wheaton@cit.act.edu.au> wrote: >Each workstation has an external USB MIDI Interface >(Emagic MT-4 or Edirol UM-3EX), which is connected to >a MIDI Keyboard and external synthesizer. > >The problem is that some of the workstations (10 of the 25) >have an M-Audio Axiom49 MIDI Keyboard that is connected >to the external USB MIDI Interface by MIDI cables, but is >also connected to the workstation directly by USB to provide >power to the keyboard. > >This causes double notes being input into Logic, There is no reason to have both MIDI cable hookup *and* the USB hookup, since the USB also carries the MIDI signal. Disconnect the MIDI cable. Yes, you can send one of these physical MIDI inputs to a dead-end inside Logic's environment (using the Physical Input MIDI object), but this is a roundabout way of fixing a problem which shouldn't and doesn't need to exist. You'd just be complicating the system needlessly. Or maybe you want to complicate it for the purposes of teaching? That could be valid. f-erenc szabo, smarty pants Z+E+R+O+B+E+A+T "NOW POWERED BY THE MIRACLE OF THE TRANSISTOR!" <http://home.goodmedia.com/~zerobeat>