you have a sequencer with two midi ins and outs. One keyboard in,out,thru and two modules in,out,and thru. Follow me so far??
the midi keys are connected to the in and out of the sequencer. One module is connected to the out of the sequencer via its midi in. Now, the other is connected to the thru of the keyboard via its midi in. The
question is how can you control the second module without messing with the info you've sent to the keyboard already or do you control the second module from the keyboard???