The Cubase racks feature is a different approach to using Kontakt, and can be useful for those that prefer more control over their outputs. This article will cover using racks with multi's in Kontakt.
Step-by-Step
1) With Cubase open, press F11 or go to Studio > VST Instruments from the top menu dropdown.
Select the racks dropdown, then add an instance of Kontakt.
A window will pop up asking if you'd like to create a MIDI track with this, select yes and create one.
2) With Kontakt open, load up the patches you wish to use in your multi. For this example, I'm using the 5 Performance Legato patches from Symphonic Strings. By default, you will see that the MIDI channels will automatically assign depending on the load order.
More often than not, it's useful to have different outputs assigned. Provided that you have Kontakt set up to do so (see here if you haven't), you can go ahead and assign different outputs:
3) Now that Kontakt is set up, we need to create the rest of the MIDI tracks in Cubase. Right click your existing MIDI track to add more.
As we have 5 tracks in total, we need to create 4 MIDI tracks to make up 5 overall.
Once done and after renaming your tracks, the window should look as follows:
4) We now need to activate the additional outputs within Cubase, so once again open the VST Instruments editor by either pressing F11 or selecting Studio > VST Instruments from the top menu dropdown.
Once opened, we can activate the outputs by selecting the furthest right arrow:
We have 5 instruments in total, so we'd want to select 4 additional outputs:
5) Once created the Outputs will be unnamed. You'll need to name these to correspond to the Instruments. You can refer to the Kontakt outputs to make sure you've got everything correct. This is how ours looks finished:
6) You're done! You should now be able to play each MIDI track each with their own individual output.