I have some MIDI on a track in RB, and it's being sent to my external synth. So far so good. However, when I press play in RB, the patch on my synth changes.

At first I thought the MIDI had a patch change in it, but I scrutinized it in Sonar's Event List view...no patch changes. Besides, the patch change happens no matter where I am in the MIDI track when I press play...start, middle of the track, wherever.

Could it be SYSEX data being sent from RB?

How can I disable whatever it is in RB which is sending the patch change data to my external synth?

Thank you.