Switching Between MIDI Connections on the USB-to-MIDI Converter (Windows)
By default, the system expects the MIDI cables to be connected to MIDI port A (OUT-A and IN-A) on the MIDISPORT 2x2 device. If you need to switch to a different port connection, create a system environment variable as described in this section.
To switch between MIDI port connections:
1.  Make sure the cables on the MIDISPORT 2x2 USB-to-MIDI converter are connected to the port you want to use. For information on connecting the MIDISPORT device to the fader controller, see Connecting Serial and MIDI Port Devices.
2.  Click the Start button, and select Settings > Control Panel.
3.  Double-click System.
The System Properties dialog box opens.
4.  Click the Advanced tab.
5.  Click the Environment Variables button.
The Environment Variables dialog box opens.
6.  (Option) To switch from port A to port B:
a.  Click New in the System Variables area.
The New System Variables dialog box opens.
b.  Type OTHER_MIDI_PORT in the Variables Name text box.
c.  Type 1 in the Variable Value text box.
d.  Click OK.
The OTHER_MIDI_PORT entry appears in the System Variables list of the Environment Variables dialog box.
7.  (Option) To switch from port B to the default port A:
a.  Select OTHER_MIDI_PORT in the System Variables list.
b.  Click Delete.
8.  Click OK.
9.  Click OK to close the System Properties dialog box.
10.  Start the Avid application, and then select Tools > Automation Gain.
The indicator lights on the Automation Gain tool should change to blue. If the lights do not change to blue, see Troubleshooting the MIDI Connections.

Some features described in Help are available only in Avid Xpress Pro or Avid Xpress DV. For more information about Avid Free DV go to
www.avid.com.