Hey,
I'm not a big MIDI user, mainly audio, but I've recently acquired Native Instruments Vintage Organs, and been using the PRV controllers to control the Organ's  Leslie, which has worked no problem. I've just been learning to use controllers in the PRV, so some how I've fumble-fingered my way into setting something that's making the  volume change so that the first bar is loud, but then after that it drops to about one third the volume. The volume/velocity of all the individual notes, are the same. Deleting all the controller lanes of course doesn't help, as this doesn't remove any MIDI controller data.  I believe I've deleted every individual controller event in the PRV  that I can see, that possibly could cause this. Seems like there's some sort of hidden controller event there.
 
Any ideas?
 
It's probably not relevant, but I'm using X3c
 
thanks
http://axiology.bandcamp.com

The event view would be a good place to start. It should show all the events for the track.

Thanks, that did it, simple solution. Too bad the offending controller events weren't more visible in the PRV. Possibly I just needed to expanded the PRV to full screen to see them.
http://axiology.bandcamp.com