You can change the MIDI transmission channel of all selected events by
entering the desired channel number and clicking OK.
Note: MIDI channels hard assigned to individual note events across a given track will be ignored unless that tracks Output is assigned directly to Port:. In other words, every MIDI channel of every MIDI event across any given track will be reassigned to the MIDI channel and output port of that tracks currently selected Metro Output (or Outputs). An Outputs MIDI channel and port can be changed within the Define Output dialog. The Define Output dialog can be accessed by Option-clicking on a Metro Output Name in the Tracks or Graphic Editor windows, or double-clicking on an Outputs Name at the bottom of the Instruments Mixer window.
Setting a Channel in the Instruments Mixer Window
Setting Output Channels