X1 MK3 Mapping - How to use modifiers?

IS_17m

I would like to map my X1 MK3 (some specific buttons, not all of them) to control stems. I have Traktor Pro 4 running on Windows 10.

For now I only want to map the shift button and the 8 buttons and 8 knobs of the upper mixer section of the unit. My question is about the use of modifiers. I've found a link where this is explained but I'm still a bit confused about this. Link - https://djtechtools.com/2014/05/11/midi-mapping-101-the-traktor-modifier-re-explained/%29.

I would like to comprehend in which cases the modifiers are used and applied. A practical example - is it possible to map the knobs of the upper section mixer so they work like this:

• without any key combination, simply rotating each of the four knobs on the left side changes the volume of each stem on deck A
• pressing and holding SHIFT and rotating each knob (the same previously mentioned) changes the volume of each stem filter on deck A

In this example, do I need to use the modifiers when mapping? If yes, how and why?

Thanks

Frank