I circled THRU CHANNEL because when I'm sending MIDI data to one device, I typically make sure this dialog shows the receiving channel of that device as the THRU channel. You may have to switch channel numbers around to make it happen.

If sending data to more than one device, you need more than one channel dedicated to MIDI.

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also notice the the 3rd column in the dialog is PATCH... if there is a value in that field, that patch number WILL get sent to whatever channel is in the first column

There is also other midi data for volume etc being sent to each of the channels in this dialog... upshot is, if you want total control of what gets sent when, you probably want to clear the data from these boxes

(or, use this dialog as the preferred way to send patches to your devices)
Event editor gives control of the exact time the patch is sent... I think this dialog always sends it at the beginning of the song.

Last edited by Pat Marr; 12/10/15 05:52 PM.
https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0