Each loaded VSTi in Notion 4 is an instrument channel. Each instance of a VSTi is an instrument channel. In the case that you are using Kontakt or VSL, the VSTi has it's own mixers that allow you to control the output to Notion. I will show you an example:

- Kontakt Outputs.png (136.18 KiB) Viewed 5913 times
At the bottom of the Kontakt instance, you can see that there is a channel that has been added for the Bansuri instrument in Kontakt. That channel strip controls the output to Notion and it is currently sending to 1-2 as a stereo output.
This can be reassigned as you see fit and more channels can be added as instruments are added to the Kontakt Multi. In the figure below, I have added a second instrument and reset the channel outputs of each instrument to a different stereo out. Bansuri is outputting to channels 1-2 stereo and the Irish Flutes are outputting to Channels 3-4.

- Kontakt Channel 2.png (93.52 KiB) Viewed 5913 times
Once you have something like this set up, you can go into the Notion Mixer and set the receiving channels on the VSTi mixer group like this:

- VSTi Group Mixer Returns.png (240.15 KiB) Viewed 5913 times
The returns in Notion correspond to the channel outputs of Kontakt. I now have individual control of two instruments in Kontakt within the Notion Mixer. VSL works in similar fashion when you are using Vienna Ensemble. Make sure you scroll down in the picture of the Notion mixer to see that the return channels are set to correspond to the Kontakt outputs/sends.
So here are some questions for you:
1. What VSTi are you using?
2. Does the VSTi you are using have a mixing host of some sort in which you can set outputs?
3. If it does have a mixing host, is Notion recognizing the capabilities for your VSTi to setup the Channel Outputs in a manner similar to the above example?
Looking forward to hearing from you,
-Admin