IQ ave a go at this.....

1. This tutorial explores Remapping Controller messages using the ‘input transformer’. One hardware controller there’s easy access to is the modulation wheel on the midi keyboard. With the synth playing, move the wheel and notice the effect - it usually puts a kind of deep vibrato effect on whatever the sound is. That’s because the modulation wheel is putting out 'Controller 1' messages - and controller 1 is the one that affects modulation depth in the synth's midi language. Set the wheel back to 'zero'.

2. In the left hand vertical Inspector panel, look at the buttons underneath where it says 'MIDI 01'. Look for the right hand button with the 'crooked arrow' symbol. Press it and the 'input transformer' panel will open.
The top half sets which midi information is going to be singled out for attention - the lower panel sets where or how that information is going to be redirected.

3. In the top panel click on the right hand Add Line button. In that line, click under each parameter and from the drop down menus set filter target to 'Type', condition to 'Equal' and parameter 1 to 'Controller'.

4. Now click to add another line. This time set filter target to 'Value 1' - it will change to 'Midi Controller No.- (because the program 'knows' that Value 1, the first Data Byte of the string, is the one that sets the controller number.) Now set Condition to 'Equal' and Parameter 1 column type in '1'. You've now set the transformer to look for Controller 1 messages.

5. Now to 'remap' them. In the lower panel click the Add line button. From the drop down menu, set the 'Action target' column to Value 1. In the operation Column, set it to 'Add'. Now in the parameter 1 column, type in '73'.

6. Check that the 'selected module 1' button is selected, and also the 'Active module 1' box is ticked, and the drop down menu says 'Transform'. Close the box. The 'crooked arrow' symbol will be lit up (blue) Notice that to turn off the transformer you have to deactivate the module - you can set up four for each track.

7. You have set the transformer to add 73 to our Controller 1 messages, making the modulation wheel remap to Controller 74 - which is 'brightness' - a kind of filter. Play the riff and try the mod wheel - a potentially much more useful effect. Note that this controller is a range of 0-127 - the filter will be 'normal' with the wheel in the middle, and back off or open up depending which way you move the wheel. Remember to 'reset' the value to the middle position before you move on to something else!!
Now try altering different controllers by setting up the 'Action Target' parameter 1 value to be the number (minus 1) of the controller you want to map the mod wheel onto.

8. Now try out the following list of controllers remapped to the mod wheel - they should work (in GM); try them on different types of sounds - think about the effect you are likely or would like to get - for example altering the release time on bell like or 'chimey' sounds. Remember to subtract 1 from these controller numbers.
71 Harmonic Content
72 Release Time
73 Attack time
74 Brightness
91 Reverb depth
93 Chorus depth

Remember to 'reset' each control to it's start position before you move on to something else - or you'll leave it 'stuck' at a setting you might not want...

It’s not a good idea to record lots of control change messages on top of each other with a 'loop' going; copy and paste a long part first.