Modular control problem

I am a bit desperate with this and really tried many ways to solve this problem:

I try to build a system where one source control can control different destinations on selection. It works really fine, I have implemented it already into synths like Spark, using 4 controls freely assignable to more ore less 90 destinations.

The problem is, that on changing a "routing", there is one last event that goes into the former routing destination. The problem is still there with the minimal version of this system, one control selecting between 2 destinations.

I tried many different tricks I know and really I am clueless. Probably it is rather simple, which makes me especially frustrated not to find out.

Thank you in advance,
carloskleiber

...I forgot to say: the selection can be done by clicking on the mouse area on top of the destination knobs. In the end it is supposed to work like some kind of super-fast MIDI learn substitute.

 

As I change the destination, there is one last event that goes to the former destination:


So I thought of building some kind of inverted stepfilter, which discards the last event BEFORE value changes:


But its effect comes too late. It does discard one event, but not the one I'd like it to.


It is an event order issue that I do not seem to address at the right location

 

Never mind. I've found it.