Apple Logic Pro 7 - Manual (Page 122)

122 Chapter 3 Arrange Window
Layer and Multiplayer Mode
There are two modes of operation for simultaneous recording of multiple MIDI
tracks: Layer or Multiplayer recording.
To switch from the Layer recording mode (default) to the Multiplayer recording mode,
select the File > Song Settings > Recording > Auto Demix by Channel if Multitrack
Recording option.
Layer Recording
Incoming MIDI events are sent to all record enabled MIDI tracks. You can listen to all
selected instruments before, and during, recording. Only the selected track will display
a MIDI Region after recording. On the other tracks, aliases of the MIDI Region on the
selected track will be recorded.
The advantage of this is that any subsequent edits to the MIDI Region will affect all
aliases, and all layered tracks will remain identical.
Multiplayer Recording
Incoming MIDI events are distributed to the various record enabled tracks, according to
their transmitted MIDI channel numbers. The channel of the incoming event must
correspond to a record enabled track’s channel, in order for this functionality to work. If
no track is found with the corresponding channel number, the event will be routed,
and recorded, onto the selected track.
Be sure that the different MIDI controllers transmit on different channels. If this is not
possible, simply use different inputs on your MIDI interface, and change the MIDI
channel of each input, using a Transformer Object between the Physical Input and
Sequencer Input (see “Physical Input/Sequencer Input Objects” on page 236).
Switching MIDI Thru off
The Record button makes it very easy to switch off the MIDI Thru function—simply
deactivate the Record button of the selected track.
You can use File > Song Settings > MIDI > General to select an instrument with a
permanently disabled MIDI Thru function.