Apple Logic Pro 8 - Manual (Page 238)

238 Chapter 10 Working With Instruments and Effects
When you create a new External MIDI track in a project, Logic Pro will automatically
generate a new External MIDI Multi Instrument object. This is placed on the MIDI Instr.
layer of the Environment window.
Choose Window > Environment to take a look at this object (see Chapter 39, “ Working
in the Environment ,” on page 857 for details).
Another thing that happens in the background is the automatic creation of Mixer
channel strips for each of the Multi Instrument sub-channels. Click the Mixer button at
the bottom of the Arrange window, and click the All button in the Mixer menu bar.
You’ll see 16 channel strips, assigned to GM Device 1 to 16 (plus a couple of others for
audio channels).
To the right of the Arrange area, you’ll see the Library tab. It shows a list of your MIDI
ports and other objects. Among the items listed, you’ll see the GM Device.